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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260423T150000
DTEND;TZID=Europe/Madrid:20260423T160000
DTSTAMP:20260718T215605
CREATED:20260321T095735Z
LAST-MODIFIED:20260420T102552Z
UID:24651-1776956400-1776960000@www.ift.uam-csic.es
SUMMARY:Seminar by Maria Olalla Olea Romacho (King's College\, London)
DESCRIPTION:Title: ‘Traces from Primordial Magnetogenesis’ \n  \nSpeaker: Maria Olalla Olea Romacho (King’s College\, London) \n  \nVenue&Time: Red Room / 15:00 \n\nAbstract: Magnetic fields permeate the Universe across a wide range of scales\, from galaxies and clusters to the most underdense regions of the cosmic web. Gamma-ray observations of TeV blazars suggest the presence of magnetic fields in intergalactic voids\, where no efficient late-time astrophysical sources exist\, pointing toward a possible primordial origin and a direct link to early-Universe physics. Primordial magnetic fields arise naturally in scenarios such as inflation or cosmological phase transitions. In this seminar\, I present a multi-messenger perspective on their observational signatures. On the particle physics side\, I discuss collider-motivated models of electroweak phase transitions\, highlighting connections to blazar observations and stochastic gravitational-wave backgrounds. On the astrophysical side\, I show how primordial magnetic fields enhance small-scale structure formation\, leading to dense dark matter minihalos that boost indirect detection signals\, and how they impact high-redshift observables probed by the James Webb Space Telescope.
URL:https://www.ift.uam-csic.es/event/seminar-by-maria-olalla-olea-romacho-kings-college-london/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260422T113000
DTEND;TZID=Europe/Madrid:20260422T163000
DTSTAMP:20260718T215605
CREATED:20260413T114758Z
LAST-MODIFIED:20260419T204443Z
UID:24889-1776857400-1776875400@www.ift.uam-csic.es
SUMMARY:Madrid's Polygonal Gravity Seminar Series
DESCRIPTION:Venue&Time: Red Room / 11:30 / 15:00 \nPROGRAM: \n——————— \n11:00 Welcome coffee \n——————— \n11:30h     First Talk \nSpeaker: Jelle Hartong (Edinburgh U.) \nTitle: The Geometry of Gravitational Radiation \nAbstract: This talk concerns asymptotically flat vacuum solutions of GR in\n4 spacetime dimensions. The asymptotics of such metrics is quite intricate\nand depends on how we approach infinity. If we follow null geodesics we\nend up at future null infinity. This is where massless fields\, including\ngravitational radiation ends up. In this talk we will study the metric\nnear future null infinity with an emphasis on geometrical structures that\nemerge in that part of the spacetime. \nFuture null infinity of an asymptotically flat spacetime is a conformal\nCarroll manifold. I will not assume any familiarity with Carroll geometry\nand explain the relevant geometrical notions as we go along. We will\nconsider asymptotic solutions to the 4D vacuum Einstein equations where\nfuture null infinity is endowed with the most general Carroll metric data\nthat is allowed by the Einstein equations. This can be used to define an\nenergy-momentum tensor (EMT) at future null infinity by varying a suitably\nrenormalised action with respect to the boundary Carroll metric data. It\nis shown that the Ward identities obeyed by this boundary EMT agree with\nthe Bondi loss equations that describe the loss of energy and momentum due\nto the emission of gravitational waves. The metric near future null\ninfinity can be formulated in terms of a Cartan geometry based on the\nconformal Carroll algebra. The non-vanishing curvatures of said algebra\ndictate how radiative the spacetime is. For example\, the vacuum degeneracy\nis described by a flat conformal Carroll connection. We will see that the\nBondi loss equations can be rewritten as flux-balance laws where the\nfluxes are determined by the Cartan geometry for the conformal Carroll\nalgebra. \n——————– \n15:00h     Second Talk \nSpeaker: Eric A. Bergshoeff (U. of Groningen) \nTitle: Massive gravity in the lab \nAbstract: In this talk I will discuss a connection between the so-called\nchiral massive GMP spin-2 mode in the Fractional Quantum Hall effect and a\nthree-dimensional (one time and two space) relativistic massive spin-2\nfield in quantum field theory. In particular\, I will show how the spin-2\nGMP mode follows by taking a special non-relativistic limit of linearized\nthree-dimensional massive gravity which are the planar Fierz-Pauli\nequations. I will discuss how these results can be generalized to integer\nhigher-spins and will present results for half-integer spins as well. \n——————– \n16:15  Farewell coffee \n—————————————————————————– \nMore information about these and following monthly seminars can be found at the\nwebpage \nhttps://sites.google.com/view/polygrav \nWe very much hope to see you there! (No registration is needed) \nFernando Barbero (IEM)\, Guillermo Mena (IEM)\, Luis Garay (UCM)\,\nMercedes Martin-Benito (UCM)\, Daniele Oriti (UCM)\, Tomas Ortin(IFT)\, Francesca\nVidotto (IEM)\, Eduardo Villaseñor (UC3M)
URL:https://www.ift.uam-csic.es/event/madrids-polygonal-gravity-seminar-series-2/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260420T150000
DTEND;TZID=Europe/Madrid:20260420T150000
DTSTAMP:20260718T215605
CREATED:20251128T155230Z
LAST-MODIFIED:20260420T101759Z
UID:23977-1776697200-1776697200@www.ift.uam-csic.es
SUMMARY:Seminar by Isaac Tutusaus (ICE\, Barcelona)
DESCRIPTION:Title: Probe combination to constrain cosmology in Euclid \nSpeaker: Isaac Tutusaus (ICE\, Barcelona) \nVenue&Time: Red Room / 15:00 \nAbstract: Following its successful launch in July 2023 and the start of its scientific survey in February 2024\, Euclid has become the first stage-IV photometric survey in operations. In addition to its photometric observations\, Euclid is also conducting a spectroscopic survey\, which allows us to add even more probes to a combined analysis from Euclid data alone. In this talk I will present the forecasts for a combined analysis at the end of the mission\, focusing in particular on how combining multiple probes helps break parameter degeneracies and leads to tighter constraints on the cosmological model under investigation. I will conclude by outlining current efforts toward a combined analysis with Euclid’s first data release.
URL:https://www.ift.uam-csic.es/event/seminar-by-isaac-tutusaus-ice-barcelona/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260416T150000
DTEND;TZID=Europe/Madrid:20260416T160000
DTSTAMP:20260718T215605
CREATED:20260119T110832Z
LAST-MODIFIED:20260416T075356Z
UID:24228-1776351600-1776355200@www.ift.uam-csic.es
SUMMARY:Seminar: 'Symmetry TFTs for Continuous Spacetime Symmetries'
DESCRIPTION:Title: Symmetry TFTs for Continuous Spacetime Symmetries \nSpeaker: Iñaki Garcia Etxebarria (Durham U.) \nVenue & Time: Red Room / 3:00 PM \nAbstract: I will discuss our recent proposal for the Symmetry Topological Field Theory (SymTFT) for global\, continuous spacetime symmetries ( https://arxiv.org/abs/2509.07965 ). For a d-dimensional theory\, it is given by a (d + 1)-dimensional BF-theory for the spacetime symmetry group\, and whenever d is even\, it includes also Chern-Simons couplings\, that encode conformal and gravitational anomalies. This proposal is supported by the similarity to two- dimensional Jackiw-Teitelboim gravity in the d = 1 case and the topological limit of four-dimensional gravity in the d = 3 case. I will discuss how topological defects constructed from this SymTFT act by applying the associated spacetime symmetry transformation. Finally\, I will discuss the relation to gravity and holography.
URL:https://www.ift.uam-csic.es/event/seminar-by-inaki-garcia-etxebarria/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260409T150000
DTEND;TZID=Europe/Madrid:20260409T160000
DTSTAMP:20260718T215605
CREATED:20260310T093813Z
LAST-MODIFIED:20260407T094840Z
UID:24570-1775746800-1775750400@www.ift.uam-csic.es
SUMMARY:Seminar: 'EFTs for BSM: Counting\, Ambiguities\, and Application'
DESCRIPTION:Title: ‘EFTs for BSM: Counting\, Ambiguities\, and Application’\n\n\nSpeaker: Shakeel Ur Rahaman (IPPP Durham).\n\n\nVenue&Time: Red Room / 15:00 \nAbstract: The two principal frameworks for modeling the Beyond Standard Model physics as an Effective Field Theory (EFT) are the Standard Model EFT (SMEFT) and the Higgs Effective Field Theory (HEFT). SMEFT is constructed in the electroweak symmetric phase\, inherently utilizing the Higgs doublet\, whereas HEFT is defined in the broken phase using the physical Higgs boson alongside a separate set of Goldstone bosons. The unavoidable necessity of truncating these effective field theory expansions creates technical ambiguities that are fundamentally interwoven with the redundancies inherent in general field redefinitions. In this talk regarding HEFT\, the focus will be primarily on its methodology for building operators\, its power counting scheme\, and the associated truncation uncertainties. These properties are already well-established within the SMEFT framework. For SMEFT\, the discussion will center on its application in precision calculations and its practical implementation in Monte Carlo event generators such as Sherpa.
URL:https://www.ift.uam-csic.es/event/seminar-by-shakeel-ur-rahaman/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260323T150000
DTEND;TZID=Europe/Madrid:20260323T160000
DTSTAMP:20260718T215605
CREATED:20251121T121550Z
LAST-MODIFIED:20260319T102754Z
UID:23860-1774278000-1774281600@www.ift.uam-csic.es
SUMMARY:Seminar: 'Observing Quantum Gravity in Extremely Cold Horizons'
DESCRIPTION:Title: ‘Observing Quantum Gravity in Extremely Cold Horizons’ \nSpeaker: Roberto Emparan (Universidad de Barcelona) \nVenue&Time: Red Room / 15:00 \nAbstract: Recent developments have revealed that black holes near extremality exhibit large quantum fluctuations in their geometry\, marking a controllable breakdown of semiclassical quantum field theory in curved spacetime. In this talk\, I will discuss how these fluctuations can be revealed through scattering waves off the black hole. In particular\, we find that extremely cold black holes become transparent to low-frequency light or gravitational radiation. Although such signatures are extraordinarily hard to detect\, they provide concrete signatures of quantum gravity at play in near-extremal regimes.
URL:https://www.ift.uam-csic.es/event/seminar-by-roberto-emparan-universidad-de-barcelona/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260319T150000
DTEND;TZID=Europe/Madrid:20260319T160000
DTSTAMP:20260718T215605
CREATED:20260119T104543Z
LAST-MODIFIED:20260310T093507Z
UID:24222-1773932400-1773936000@www.ift.uam-csic.es
SUMMARY:Seminar: 'Beyond the Minimal Axion: Robustness of Standard Predictions'
DESCRIPTION:Title: ‘Beyond the Minimal Axion: Robustness of Standard Predictions’ \nSpeaker: Sung Mook Lee (CERN) \nVenue & Time: Red Room / 15:00 \nAbstract: The QCD axion is one of the most compelling candidates for physics beyond the Standard Model\, as it can simultaneously solve the strong CP problem and account for the dark matter abundance. In the minimal single-axion framework\, especially in a post-inflationary cosmology\, the combination of axion gauge coupling quantization and axion production from string networks leads to sharp and highly predictive targets. In this talk\, we revisit these predictions in a simple but realistic setup with an additional confining dark gauge group and extra axion degrees of freedom. We will show how axion mixing and defect dynamics can modify both the coupling predictions and the relic abundance expectations through emergent features specific to multi axion scenarios\, and discuss when the standard single axion benchmarks remain reliable. This provides a useful test of what remains truly robust in extended axion theories and helps guide current experimental targets.
URL:https://www.ift.uam-csic.es/event/seminar-by-sung-mook-lee/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260316T150000
DTEND;TZID=Europe/Madrid:20260316T160000
DTSTAMP:20260718T215605
CREATED:20260129T125545Z
LAST-MODIFIED:20260225T163411Z
UID:24308-1773673200-1773676800@www.ift.uam-csic.es
SUMMARY:Seminar: 'Effective Field Theory for Thermal Phase transitions'
DESCRIPTION:Title; ‘Effective Field Theory for Thermal Phase transitions’ \nSpeaker: Mikael Chala (Granada) \nVenue&Time: Red Room / 15:00 \nAbstract: I will present recent progress in applying effective field theory (EFT) to the precise computation of thermal phase transition parameters and the associated gravitational wave spectra. I will also briefly comment on byproducts of this work\, including new methods for two-loop renormalization in EFT or skyrmion degrees of freedom emerging only at finite temperature. \n \n 
URL:https://www.ift.uam-csic.es/event/ift-seminar-mikael-chala-granada/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260309T150000
DTEND;TZID=Europe/Madrid:20260309T160000
DTSTAMP:20260718T215605
CREATED:20260119T104415Z
LAST-MODIFIED:20260309T065159Z
UID:24220-1773068400-1773072000@www.ift.uam-csic.es
SUMMARY:Seminar: 'How string theory computes quantum gravity amplitudes'
DESCRIPTION:Title: ‘How string theory computes quantum gravity amplitudes’ \nSpeaker: Lorenz Eberhardt (U. Amsterdam) \nVenue&Time: Red Room / 15:00 \nAbstract: String theory provides a framework in which quantum gravitational scattering amplitudes are ultraviolet finite and computable in perturbation theory. These amplitudes are defined by integrating over the moduli space of Riemann surfaces\, replacing the Feynman diagram expansion of field theory by a sum over worldsheet topologies. I will review how this definition arises and explain structural properties such as UV-finiteness\, dual resonance and their Regge behavior. I will then discuss recent progress in explicit computations\, focusing on one-loop amplitudes and new results on their high-energy behavior.
URL:https://www.ift.uam-csic.es/event/seminar-lorenz-eberhardt-amsterdam/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260305T150000
DTEND;TZID=Europe/Madrid:20260305T170000
DTSTAMP:20260718T215605
CREATED:20251128T154844Z
LAST-MODIFIED:20260225T162954Z
UID:23971-1772722800-1772730000@www.ift.uam-csic.es
SUMMARY:Seminar: 'Cosmological Magnetic Fields from Ultralight Dark Matter'
DESCRIPTION:Title: Cosmological Magnetic Fields from Ultralight Dark Matter \nSpeaker: Robert Brandenberger (McGill) \nVenue&Time: Red Room / 15:00 \nAbstract: A coherently oscillating ultralight dark matter field which couples to electromagnetism in the same way as an axion induces a tachyonic instability which leads to the generation of cosmological magnetic fields immediately after the time of recombination. The mechanism also opens up channels which can facilitate the formation of supermassive black holes.
URL:https://www.ift.uam-csic.es/event/seminar-by-robert-brandenberger-mcgill/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260302T150000
DTEND;TZID=Europe/Madrid:20260302T160000
DTSTAMP:20260718T215605
CREATED:20251128T154934Z
LAST-MODIFIED:20260225T163456Z
UID:23973-1772463600-1772467200@www.ift.uam-csic.es
SUMMARY:Seminar: 'The tensions of LCDM: An update of observations and theoretical implications'
DESCRIPTION:Title: ‘The tensions of LCDM: An update of observations and theoretical implications’ \nSpeaker: Leandros Perivolaropoulos (Ioannina) \nVenue&Time: Red Room / 15:00 \nAbstract: The standard LCDM cosmological model\, despite its success in describing the large-scale structure of the Universe\, is currently challenged by statistically significant discrepancies between early and late-universe observations. In this talk\, I provide a comprehensive update on observational status and theoretical implications of three major tensions: the Hubble (H0) constant discrepancy\, the DESI DR2 Phantom-Crossing Anomaly\, and the S8 tension. First\, I re-examine the H0 tension by classifying 88 Sound-Horizon-Free measurements. This analysis reveals that the discrepancy is not merely an “Early vs. Late” issue but is fundamentally driven by a clash between the Distance Ladder and the majority of other probes (reaching a significance of ~ 6.5\sigma). I will further discuss why simple late-time modifications to the expansion history fail to solve this tension due to constraints from unanchored Type Ia Supernovae (Pantheon+)\, effectively establishing a “no-go” theorem for such solutions.\nSecond\, I address the implications of the recent DESI DR2 data\, which favors a dynamical dark energy equation of state crossing the phantom divide (w(z) < -1). While this behavior is forbidden in simple quintessence models within General Relativity\, I demonstrate how it can be naturally accommodated in reconstructed Scalar-Tensor theories. By allowing for an evolving effective gravitational constant (G_eff)\, these models can fit the phantom crossing while simultaneously alleviating the Hubble tension. Finally\, I review the current landscape of the S8 tension. I discuss the shift toward a “Combined CMB” baseline (Planck + ACT + SPT) which reduces uncertainties\, and analyze the dichotomy currently present in weak lensing surveys (e.g.\, DES Year 6 vs. KiDS Legacy). I conclude by summarizing which theoretical extensions of LCDM remain viable in the face of these combined precision constraints. (edited)
URL:https://www.ift.uam-csic.es/event/seminar-by-leandros-perivolaropoulos-ioannina/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260226T150000
DTEND;TZID=Europe/Madrid:20260226T160000
DTSTAMP:20260718T215605
CREATED:20260119T110411Z
LAST-MODIFIED:20260225T154031Z
UID:24224-1772118000-1772121600@www.ift.uam-csic.es
SUMMARY:Seminar: 'Sub-PeV gamma-ray astronomy and its physics'
DESCRIPTION:Title: ‘Sub-PeV gamma-ray astronomy and its physics’ \nSpeaker: Sei Kato (Sorbonne Université\, Institut d’Astrophysique de Paris) \nVenue&Time: Red Room / 15:00 \nAbstract: This talk will focus on the physics that can be explored with sub-PeV gamma-ray astronomy (E > 10^14 eV)\, particularly on the Galactic diffuse gamma rays and the dark matter. Also\, our project called ALPACA\, which aims systematic sub-PeV gamma-ray observations in the southern sky for the first time in the world\, is detailedly presented.
URL:https://www.ift.uam-csic.es/event/seminar-by-sei-kato-institut-dastrophysique-de-paris/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260226T110000
DTEND;TZID=Europe/Madrid:20260226T120000
DTSTAMP:20260718T215605
CREATED:20260220T140022Z
LAST-MODIFIED:20260716T090204Z
UID:24432-1772103600-1772107200@www.ift.uam-csic.es
SUMMARY:GRASS Seminar: 'Gravitational Duality at the Lightring\, QNM isospectrality\, and Ringdown Nonlinearities from Penrose Limits'
DESCRIPTION:Gravity\, Supergravity and Superstrings (GRASS) Seminar \nSpeaker: David Pereñiguez (Johns Hopkins U.) \nTitle: ‘Gravitational Duality at the Lightring\, QNM isospectrality\, and Ringdown Nonlinearities from Penrose Limits’ \nAbstract: At high frequencies\, the physics near a black hole’s lightring can be captured by Penrose-limit plane waves adapted to the photon sphere. In this talk\, I will solve exactly the equations for gravitational perturbations in this limit using Penrose’s 2-spinor formalism\, and I will show that the resulting solutions correspond to quasinormal modes (QNMs) in the eikonal regime. I will then prove that gravitational electric–magnetic duality holds on-shell for perturbations at the lightring. This symmetry has long been understood to hold on-shell only for perturbations about flat spacetime. The lightring therefore provides a distinct setting in which it reemerges. In addition\, QNM isospectrality follows as an immediate consequence. I will next extend the analysis to nonlinear gravitational fluctuations\, where the duality is broken\, and compute the excitation of quadratic QNMs\, which are particularly relevant given recent prospects for their detection. I will conclude by discussing further directions in which Penrose limits can be used to sharpen our understanding of lightring physics. This seminar is related to the I+D+i project whose reference is CEX2020-001007-S\, funded by MCIN/AEI/10.13039/501100011033. The topic is framed within the following research line: Strings and quantum gravity (Gravity/Strings).
URL:https://www.ift.uam-csic.es/event/grass-seminar-gravitational-duality-at-la-lightring-qnm-isospectrality-and-ringdown-nonlinearities-from-penrose-limits/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260224T150000
DTEND;TZID=Europe/Madrid:20260224T160000
DTSTAMP:20260718T215605
CREATED:20260129T125218Z
LAST-MODIFIED:20260219T111953Z
UID:24306-1771945200-1771948800@www.ift.uam-csic.es
SUMMARY:Seminar: Primordial black holes from Q-balls
DESCRIPTION:Speaker: Shunsuke Neda (ICRR\, Univ. of Tokyo) \nVenue & Time: Red Room / 15:00 \nTitle: Primordial black holes from Q-balls \nAbstract:  \nWe discuss primordial black holes (PBHs) originating from Q-balls\, which are non-topological solitons arising in complex scalar field theories with a global U(1) symmetry. Depending on the cosmic expansion history\, Q-balls can source PBH formation in both early matter-dominated (eMD) and radiation-dominated (RD) universes\, leading to distinct phenomenological consequences. \nIn the eMD scenario\, PBHs produced from Q-balls can account for the observed dark matter abundance\, and we summarize the resulting cosmological constraints. In contrast\, some scenarios of PBHs formed in a radiation-dominated universe exhibit strong PBH clustering. When motivated as seeds of supermassive black holes\, their abundance and spatial distribution are observationally constrained by isocurvature perturbations. For stellar-mass PBHs relevant to LIGO-Virgo-KAGRA\, we compute PBH merger rates in the presence of initial PBH clustering using updated methodologies. \nThis seminar illustrates how PBHs from Q-balls link particle physics models to cosmological\, astrophysical\, and gravitational-wave observations across multiple mass scales.
URL:https://www.ift.uam-csic.es/event/seminar-primordial-black-holes-from-q-balls/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260223T150000
DTEND;TZID=Europe/Madrid:20260223T160000
DTSTAMP:20260718T215605
CREATED:20251014T123153Z
LAST-MODIFIED:20260626T074506Z
UID:23328-1771858800-1771862400@www.ift.uam-csic.es
SUMMARY:Seminar: 'Asymmetric Dark Matter induced by Baryogenesis'
DESCRIPTION:Title: ‘Asymmetric Dark Matter induced by Baryogenesis’ \nSpeaker: Miguel Escudero (CERN) \nVenue&Time: Red Room / 15:00 \nAbstract: We live in a Universe where structures are made out of baryons but not of antibaryons. Could the dark matter be made of particles and not antiparticles? This is an old question and many asymmetric dark matter scenarios have been proposed to date. Among them\, the models where a dark matter asymmetry is induced from the baryon/lepton asymmetries are particularly motivated. In this seminar\, I will highlight the motivations for these types of frameworks but also their challenges. I will then present a new\, minimal\, and predictive scenario that we developed in [2511.10731]. In this model\, a dark matter asymmetry is slowly generated from the Standard Model Higgs doublet asymmetry. The scenario features two dark matter states which can lead to signals in the next generation of dark matter experiments\, and we predict a new inert Higgs doublet with mass < 580 GeV which could be produced and observed at the LHC and future colliders. \nThis seminar is related to the I+D+i project whose reference is CEX2020-001007-S\, funded by MCIN/AEI/10.13039/501100011033. The topic is framed within the following research line: Particle Physics in the Standard Model and Beyond (BSM). \n \n  \n 
URL:https://www.ift.uam-csic.es/event/seminar-by-miguel-escudero/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260209T150000
DTEND;TZID=Europe/Madrid:20260209T160000
DTSTAMP:20260718T215605
CREATED:20251128T152946Z
LAST-MODIFIED:20260209T135631Z
UID:23967-1770649200-1770652800@www.ift.uam-csic.es
SUMMARY:Seminar: 'The Muon Magnetic Moment Mystery: a 20-year puzzle in high-energy physics'
DESCRIPTION:Speaker: Zoltan Fodor (Penn State U.) \nVenue & Time: Red Room / 15:00\n\nTitle: The Muon Magnetic Moment Mystery: a 20-year puzzle in high-energy physics \nAbstract: \nIn the last two decades or so there have been stronger and stronger disagreements between direct measurements of the anomalous magnetic moment of the muon and the standard-model prediction. Such a large discrepancy would be a signal for an interaction or particle not present in the standard model. However\, already in 2020 a lattice QCD calculation suggested a “no-tension” scenario. I report on our new lattice QCD calculation\, which reduced the uncertainty of our 2020 result by about 40%. The agreement between the measured value of the anomalous magnetic moment of the muon and its theoretical predictions is an extremely impressive prove of the validity of quantum field theory –with three very different calculational frameworks for QED\, EW and QCD– up to 11 digits.
URL:https://www.ift.uam-csic.es/event/seminar-by-zoltan-fodor-penn-state-u/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260205T150000
DTEND;TZID=Europe/Madrid:20260205T160000
DTSTAMP:20260718T215605
CREATED:20251121T121740Z
LAST-MODIFIED:20260126T091823Z
UID:23864-1770303600-1770307200@www.ift.uam-csic.es
SUMMARY:Seminar by Yushi Mura (KEK)
DESCRIPTION:Title: ‘UV completion of extended Higgs models via the confinement of SU(2) gauge’ \nSpeaker: Yushi Mura (KEK) \nVenue & Time: Red Room / 15:00 \nAbstract: The extended Higgs sectors are often introduced to explain phenomena beyond the standard model. On the other hand\, the existence of multiple scalar fields may cause the Landau pole below the Planck scale. Therefore\, those models should be replaced by more fundamental theory at high energies. In this talk\, we consider an asymptotic-free SU(2) gauge theory as a UV-completion of the extended Higgs models and assume they are the consequence of confinement of the gauge theory. We find that particle contents of various extended Higgs sectors previously proposed are deduced by each charge assignment of flavor symmetry of the fundamental fermions of the SU(2) gauge symmetry.
URL:https://www.ift.uam-csic.es/event/seminar-by-yushi-mura-kek/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260204T113000
DTEND;TZID=Europe/Madrid:20260204T170000
DTSTAMP:20260718T215605
CREATED:20260202T070813Z
LAST-MODIFIED:20260202T070813Z
UID:24319-1770204600-1770224400@www.ift.uam-csic.es
SUMMARY:Seminar: 'Co-Scaling and Alignment of Electric and Magnetic States'
DESCRIPTION:Speaker: Tom Rudelius (Durham U.\, Dept. of Math.)\n\n\n\n\n\n\nTitle: Co-Scaling and Alignment of Electric and Magnetic States\n\n\n\nVenue & Time: Red Room / 11:30\n\n\n\n\n\n\n\n\nAbstract: Towers of electrically and magnetically charged states in quantum gravity often exhibit two important properties. First\, the ratio of the mass (or tension) of electrically charged states to magnetically charged states is of order g^2\, which we refer to as “co-scaling.” Second\, in theories of multiple gauge fields\, the towers of states that exhibit co-scaling have charges that point in approximately the same direction in charge space as measured by the gauge kinetic matrix\, which we refer to as “alignment.” In this talk\, I present heuristic arguments for and examples of co-scaling and alignment in the string landscape\, and I discuss applications to phenomenology and cosmology.
URL:https://www.ift.uam-csic.es/event/seminar-co-scaling-and-alignment-of-electric-and-magnetic-states/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260202T150000
DTEND;TZID=Europe/Madrid:20260202T160000
DTSTAMP:20260718T215605
CREATED:20251128T152750Z
LAST-MODIFIED:20260625T091139Z
UID:23965-1770044400-1770048000@www.ift.uam-csic.es
SUMMARY:Seminar: 'F(ℓ)avoured searches: new physics in the 3rd generation'
DESCRIPTION:Title: ‘F(ℓ)avoured searches: new physics in the 3rd generation’ \nSpeaker: Tamara Vázquez Schröder (IFAE) \nVenue & Time: Red Room / 15:00 \n\n \n  \nAbstract: The primary goal of the Large Hadron Collider (LHC) has been to discover the mechanism of electroweak symmetry breaking (EWSB). The discovery of the Standard Model (SM)-like Higgs boson in 2012 was the first step to achieve this. However\, the underlying nature of EWSB remains unknown. Additionally\, the SM cannot explain the origin of neutrino masses\, the asymmetry between matter and antimatter in our universe\, or the nature of dark matter and dark energy. It also cannot address important conceptual questions\, such as why is the Higgs boson so light compared to the Planck scale\, or what are the underlying dynamics through which the Higgs field provides masses to the fundamental particles. Even though the LHC has not discovered any Beyond the Standard Model physics\, there are multiple hints in various areas of particle physics which could revolutionise our understanding of the elementary particles and the forces between them\, leading to the start of a new Higgs and Flavour Era. In this talk I will dive into promising new physics models coupled preferentially to 3rd generation quarks or leptons that could address some of the shortcomings of the SM and could potentially explain some of the observed tensions in the particle physics landscape. Being potentially at the reach of the LHC collision energy\, the search for these new physics signals in the multilepton final state could be the key to access a new era in particle physics exploration. \nThis seminar is related to the I+D+i project whose reference is CEX2020-001007-S\, funded by MCIN/AEI/10.13039/501100011033. The topic is framed within the following research line: Particle Physics in the Standard Model and Beyond (BSM). \n  \n \n 
URL:https://www.ift.uam-csic.es/event/ift-seminar-tamara-vazquez-schroder/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260129T150000
DTEND;TZID=Europe/Madrid:20260129T160000
DTSTAMP:20260718T215605
CREATED:20251128T152607Z
LAST-MODIFIED:20260625T090146Z
UID:23963-1769698800-1769702400@www.ift.uam-csic.es
SUMMARY:Seminar by Ennio Salvioni (IFAE): 'Probing the Dark Sector with Large Scale Structure'
DESCRIPTION:Title: ‘Probing the Dark Sector with Large Scale Structure’ \nSpeaker: Ennio Salvioni (IFAE) \nVenue&Time: Red Room / 15:00 \nAbstract: Precision cosmology offers opportunities to test the nature of dark matter independently of any interactions with the visible sector. I will discuss how data from galaxy surveys\, including the ongoing DESI and Euclid projects\, can be leveraged to probe new dynamics in the dark sector. For this purpose\, I will show how to extend the Effective Field Theory of Large Scale Structure to include physics beyond the Standard Model\, enabling perturbative computations of the power spectrum of galaxies. The scenarios I will discuss include long-range dark matter self-interactions\, and sub-components of dark matter exhibiting suppressed growth of structure\, such as ultra-light axions or light thermal relics. \nThis seminar is related to the I+D+i project whose reference is CEX2020-001007-S\, funded by MCIN/AEI/10.13039/501100011033. The topic is framed within the following research line: Origin and composition of the universe: Astroparticles and Cosmology (Astro/Cosmo).
URL:https://www.ift.uam-csic.es/event/ift-seminar-ennio-salvioni/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260129T113000
DTEND;TZID=Europe/Madrid:20260129T163000
DTSTAMP:20260718T215605
CREATED:20260121T105004Z
LAST-MODIFIED:20260128T182326Z
UID:24245-1769686200-1769704200@www.ift.uam-csic.es
SUMMARY:Polygonal Gravity Seminars
DESCRIPTION:Madrid’s Polygonal Gravity Seminar Series\nWednesday\, January 29th. Blue Room (IFT)\n\n11:30h First talk\n\nSpeaker: Robie Hennigar (U. Durham\, UK)\nTitle: Building Regular Black Holes\n\nAbstract: The study of regular (singularity-free) black holes has a long\nhistory\, but progress has been limited by the absence of a dynamical\nframework in which they form and by conceptual issues at the kinematical\nlevel. In this talk I will discuss recent work in which spherically\nsymmetric regular black holes emerge as unique solutions of gravity\ntheories with infinite towers of higher-curvature corrections\, enabling\nexplicit analyses of their formation and dynamics. I will review the\nconstruction\, summarize key results\, and highlight open problems.\n\n————————-\n\n12:45-14:15 Lunch break\n\n————————-\n\n14:30h Second talk\n\nSpeaker: Pablo Cano (U. Murcia)\n\nTitle: Amplification of new physics in the quasinormal mode spectrum of\nhighly-rotating black holes\n\nAbstract: The computation of quasinormal modes of rotating black holes in\nmodified theories of gravity has been recently made possible thanks to the\ndevelopment of new techniques\, like a modified Teukolsky equation and\nspectral methods. However\, no method so far has been able to peek into the\nhighly rotating regime — close to extremality. In this talk\, I will\nconsider a newly identified higher-curvature modification of GR that\npreserves the isospectrality of quasinormal modes in the eikonal limit. In\nthis theory\, eikonal perturbations can be described in terms of an\neffective scalar equation\, and solving it we will obtain the corrections\nto the eikonal Kerr quasinormal modes for arbitrary rotation. For moderate\nrotation\, we check that the eikonal computation gives a good approximation\nto the exact QNMs obtained from the modified Teukolsky equation\, even for\nlow harmonics. For high rotation\, we discover that the corrections to GR\nbecome much larger and can lead to dramatic effects. Our results suggest\nthat the observation of the ringdown of a highly rotating black hole would\nbe a “golden event” to search for new physics.\n\n———————————————–\n\nMore information about these and following monthly seminars can be found at the webpage
URL:https://www.ift.uam-csic.es/event/polygonal-gravity-seminars/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260122T150000
DTEND;TZID=Europe/Madrid:20260122T160000
DTSTAMP:20260718T215605
CREATED:20251107T112645Z
LAST-MODIFIED:20260116T124034Z
UID:23691-1769094000-1769097600@www.ift.uam-csic.es
SUMMARY:Seminar: 'Reviving PBHs: primordial black holes from supercooled phase transitions revisited'
DESCRIPTION:Speaker: Piotr Toczek (Warsaw University) \nVenue & Time: 15:00 / Red Room \nAbstract: Primordial black holes\, hypothetical objects that may have formed in the early Universe through the interplay between high-energy physics and gravity\, are very appealing candidates for dark matter. In this seminar\, I will discuss their formation as a result of the collapse of energy density fluctuations originating from supercooled first-order phase transitions. I will present the formalism that we use to track the evolution of such fluctuations in a fully covariant manner\, explicitly incorporating the spacetime metric perturbations. I will show which aspects of the phase transition drive the growth of density fluctuations and their gravitational collapse\, and identify the transitions for which the produced population of primordial black holes may constitute a significant fraction of the total dark matter abundance.
URL:https://www.ift.uam-csic.es/event/seminar-by-piotr-toczek-warsaw-university/
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260115T150000
DTEND;TZID=Europe/Madrid:20260115T160000
DTSTAMP:20260718T215605
CREATED:20251105T135455Z
LAST-MODIFIED:20260112T102251Z
UID:23689-1768489200-1768492800@www.ift.uam-csic.es
SUMMARY:Seminar: 'Dark Sector Karaoke: A 3D EFT for a Pitch-Perfect Phase Transition'
DESCRIPTION:Speaker: Cristina Puchades Ibáñez (University of Mainz) \nVenue & Time: Red Room / 15:00 \nAbstract: We explore the dynamics of cosmological phase transitions in a dark sector model featuring a dark photon associated with a U(1)D gauge symmetry and radiative symmetry breaking. Our analysis focuses on different approaches to construct the effective potential: the high-temperature approximation\, a full numerical evaluation of the thermal integrals\, and a dimensionally reduced 3D effective theory built with DRalgo\, at both leading and next-to-leading order. We as well explore the effect of including the running of the parameters in order to respect the hiercarchy scales. We investigate how these methods impact the characterization of the phase transition\, particularly in the supercooled regime. Our results show the importance of method choice when predicting observable signatures\, and establish a benchmark for future studies of first-order phase transitions in models with weakly coupled dark sectors.
URL:https://www.ift.uam-csic.es/event/seminar-by-cristina-puchades-ibanez-university-of-mainz/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260114T150000
DTEND;TZID=Europe/Madrid:20260114T170000
DTSTAMP:20260718T215605
CREATED:20260108T231658Z
LAST-MODIFIED:20260108T234236Z
UID:24163-1768402800-1768410000@www.ift.uam-csic.es
SUMMARY:GRASS Seminar: 'Axions\, Three-Forms\, and M-Theory'
DESCRIPTION:Gravity\, Supergravity and Superstrings (GRASS) Seminar \nSpeaker: Ziqi Yan (Niels Bohr Institute\, Denmark) \nVenue & Time: Red Room / 15:00 \nAbstract: Scalar fields with masses protected by global shift symmetries\, commonly referred to as axions\, are abundantly used in effective field theories in cosmology and particle physics. I will discuss a (4+1) dimensional braneworld construction for axion-like particles\, where a 3-brane is coupled to a flux in the fifth dimension orthogonal to the brane\, and its uplift to M-theory. From the (3+1)-dimensional perspective\, this construction generates a mass for the axion and matches previously known proposals based on the coupling between the axion and a three-form gauge field.
URL:https://www.ift.uam-csic.es/event/grass-seminar-by-ziqi-yan-niels-bohr-institute-denmark/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251215T150000
DTEND;TZID=Europe/Madrid:20251215T160000
DTSTAMP:20260718T215605
CREATED:20251128T152441Z
LAST-MODIFIED:20251218T085637Z
UID:23961-1765810800-1765814400@www.ift.uam-csic.es
SUMMARY:Seminar: 'Active Galactic Nuclei as Laboratories for Fundamental Physics'
DESCRIPTION:Speaker: Gonzalo Herrera (MIT & Harvard) \nVenue & Time: Red Room / 15:00\n\nAbstract: The vicinity of supermassive black holes at the center of Galaxies represents one of the most extreme environments in the Universe. In Active Galactic Nuclei (AGN)\, intense gravitational fields\, relativistic particle acceleration\, strong magnetic fields\, and dense ambient gas and radiation coexist in conditions unmatched by other astrophysical sources or Earth-based laboratories. Recent high-energy neutrino observations from the IceCube collaboration and their electromagnetic counterparts from AGN have revolutionized the field of multi-messenger astronomy\, providing the first direct window into the hadronic and leptonic processes operating at these cosmic accelerators\, and opening new opportunities to test fundamental physics at energies and densities beyond terrestrial reach. \nHere I will discuss how these environments can be exploited as laboratories for fundamental physics. I will first focus on dark matter–Standard Model interactions\, showing how dark matter scattering with cosmic rays\, neutrinos and gamma-rays can can lead to observable signatures on Earth. Second\, I will consider other exotic phenomena that may occur independently on the dark matter background in these environments\, such as photon-axion-like particle oscillations and microscopic black hole production from cosmic-ray collisions. Finally\, I will conclude by showing how AGN can boost the cosmic neutrino background to higher energies via Standard Model processes\, giving us a viable and promising pathway to detect the oldest particles in the Universe.
URL:https://www.ift.uam-csic.es/event/seminar-by-gonzalo-herrera-mit-harvard/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251204T150000
DTEND;TZID=Europe/Madrid:20251204T160000
DTSTAMP:20260718T215605
CREATED:20251029T111355Z
LAST-MODIFIED:20251201T091010Z
UID:23512-1764860400-1764864000@www.ift.uam-csic.es
SUMMARY:Seminar: 'The Tolerable Inhomogeneity of the Baryon Asymmetry'
DESCRIPTION:Speaker: Stefan Stelzl from EPFL\, Lausanne\n\n\nVenue & Time: Red Room / 15:00\n\n\n\nAbstract: \n\nIn this talk I present the implications of precision measurements of light element abundances in concordance with the Cosmic Microwave Background for scenarios of physics beyond the Standard Model that generate large inhomogeneities in the baryon-to-photon ratio. We show that precision Big Bang Nucleosynthesis (BBN) imposes strong constraints on any mechanism that produces large scale inhomogeneities at temperatures of the order or below a TeV. In particular\, we find that inhomogeneities of the order of at comoving length scales larger than the comoving horizon at the temperature of are in conflict with the measured light element abundances. I then briefly highlight the phenomenological consequences thereof.
URL:https://www.ift.uam-csic.es/event/seminar-by-stefan-stelzl-epfl-lausanne/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251202T150000
DTEND;TZID=Europe/Madrid:20251202T160000
DTSTAMP:20260718T215605
CREATED:20251114T160431Z
LAST-MODIFIED:20251218T085418Z
UID:23744-1764687600-1764691200@www.ift.uam-csic.es
SUMMARY:GRASS Seminar: 'Electric-magnetic duality of dyonic Kerr-Newman-NUT-AdS spacetimes'
DESCRIPTION:GRASS (GRAvity\, Supergravity & Superstrings) Seminar \nSpeaker: Cristóbal Andrés Corral (Universidad Adolfo Ibáñez\, Chle) \nVenue & Time: Red Room / 15:00 \nAbstract: We discuss the (anti-)self-duality conditions under which the electric and magnetic parts of the conserved charges of the dyonic Kerr-Newman-NUT-AdS solution become equivalent. Within a holographic framework\, the stress tensor and the boundary Cotton tensor are computed from the electric/magnetic content of the Weyl tensor. The holographic stress tensor/Cotton tensor duality is recovered along the (anti-)self-dual curve in parameter space. We show that the latter not only implies a duality relation for the mass but also for the angular momentum.  The partition function is computed to first order in the saddle-point approximation and a BPS bound is obtained. The ground state of the theory is enlarged to all the (anti-)self-dual configurations when the SO(4) and U(1) Pontryagin densities are introduced. We demonstrate this at the level of the action and variations thereof.
URL:https://www.ift.uam-csic.es/event/grass-seminar-electric-magnetic-duality-of-dyonic-kerr-newman-nut-ads-spacetimes/
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251201T150000
DTEND;TZID=Europe/Madrid:20251201T160000
DTSTAMP:20260718T215605
CREATED:20251027T105029Z
LAST-MODIFIED:20251218T085419Z
UID:23469-1764601200-1764604800@www.ift.uam-csic.es
SUMMARY:Seminar: Quantum simulation of lattice gauge theories with Rydberg atom arrays
DESCRIPTION:Speaker: Daniel González Cuadra (IFT) \nVenue&Time: Red Room / 15:00 \nAbstract: Lattice gauge theories (LGTs) describe a broad range of phenomena in condensed matter and particle physics. A prominent example is confinement\, responsible for bounding quarks inside hadrons such as protons or neutrons. When quark-antiquark pairs are separated\, the energy stored in the string of gluon fields connecting them grows linearly with their distance\, until there is enough energy to create new pairs from the vacuum and break the string. While such phenomena are ubiquitous in LGTs\, simulating the resulting dynamics is a challenging task. In this talk\, I will report the observation of string breaking in synthetic quantum matter using a programmable quantum simulator based on neutral atom arrays [Nature 642\, 321–326 (2025)]. I will first show how a (2+1)D LGT with dynamical matter can be efficiently implemented when the atoms are placed on a Kagome geometry\, with a local U(1) symmetry emerging from the Rydberg blockade\, while long-range Rydberg interactions naturally give rise to a linear confining potential between pairs of charges. In the experiment\, we probe string breaking in equilibrium by adiabatically preparing the ground state of the atom array in the presence of defects\, distinguishing regions within the confined phase dominated by fluctuating strings or by broken string configurations. Finally\, by harnessing local control over the atomic detuning\, we quench string states and observe string breaking dynamics exhibiting a many-body resonance phenomenon. As an outlook\, I will present a roadmap to further explore phenomena in high-energy physics using programmable quantum simulators.
URL:https://www.ift.uam-csic.es/event/seminar-quantum-simulation-of-lattice-gauge-theories-with-rydberg-atom-arrays-2/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251127T150000
DTEND;TZID=Europe/Madrid:20251127T160000
DTSTAMP:20260718T215605
CREATED:20251029T123222Z
LAST-MODIFIED:20251125T081857Z
UID:23518-1764255600-1764259200@www.ift.uam-csic.es
SUMMARY:Seminar: Constraining Muon decay parameters from CEvNS measurements at Spallation Sources
DESCRIPTION:Speaker: Suraj Prakash\, IFIC (Valencia)\n \nVenue&Time: Red Room / 3:00 PM \nAbstract: The talk will present a study of the sensitivity of COHERENT-like experiments to non-standard neutrino interactions within the vWEFT framework\, i.e. low-energy EFT with additional right-handed Dirac neutrinos. Our analysis incorporates\, for the first time\, flavor-general New Physics effects in both neutrino production (from pion and muon decays) and neutrino detection\, through Coherent Elastic Neutrino-Nucleus Scattering (CEvNS). As a special case\, we will highlight how CEvNS data provide an alternative probe for muon decay parameters\, for neutrino experiments where muon decay is a source of neutrinos. We will further illustrate how the results can be conveniently formulated in compact form and the ease with which they can be implemented in existing or future analyses using effective nuclear charges. Finally\, We will discuss numerical results based on current COHERENT data\, and also present estimates for the sensitivity of future measurements.
URL:https://www.ift.uam-csic.es/event/seminar-constraining-muon-decay-parameters-from-cevns-measurements-at-spallation-sources/
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251125T153000
DTEND;TZID=Europe/Madrid:20251125T170000
DTSTAMP:20260718T215605
CREATED:20251111T155545Z
LAST-MODIFIED:20251125T082113Z
UID:23716-1764084600-1764090000@www.ift.uam-csic.es
SUMMARY:EDI Trainings: 'Intersectionality. Reflection on identity\, privilege and positioning in academia'
DESCRIPTION:Speaker: Shannah Khan. Director of Intersect Madrid \nVenue & Time: Blue Room / 3:30 PM \nAbstract: This workshop offers a space for reflection and dialogue to explore how our personal identities\, experiences\, and social positions influence the way we participate in academic contexts. Through participatory activities\, it seeks to foster a deeper understanding of intersectionality and the role that privilege and position play in our interactions and perspectives within academia.
URL:https://www.ift.uam-csic.es/event/intersectionality-reflection-on-identity-privilege-and-positioning-in-academia/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
END:VCALENDAR