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X-WR-CALDESC:Events for Instituto de Física Teórica
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251202T140000
DTEND;TZID=Europe/Madrid:20251202T150000
DTSTAMP:20260405T224700
CREATED:20251128T160842Z
LAST-MODIFIED:20251128T160842Z
UID:23991-1764684000-1764687600@www.ift.uam-csic.es
SUMMARY:Cosmology Journal Club
DESCRIPTION:Every Tuesday at 2:00 PM in the discussion room on the 5th floor. \nJoin the IFT cosmology/gravity journal club at benty-fields.com to vote for papers and volunteer to present them.
URL:https://www.ift.uam-csic.es/event/cosmology-journal-club-9/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251202T150000
DTEND;TZID=Europe/Madrid:20251202T160000
DTSTAMP:20260405T224700
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:20251202T150000
DTEND;TZID=Europe/Madrid:20251202T160000
DTSTAMP:20260405T224700
CREATED:20251128T160718Z
LAST-MODIFIED:20251128T160718Z
UID:23989-1764687600-1764691200@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club
DESCRIPTION:Every Tuesday at 15:00 in Grey Room 3.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-4/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251203T113000
DTEND;TZID=Europe/Madrid:20251203T123000
DTSTAMP:20260405T224700
CREATED:20251128T170554Z
LAST-MODIFIED:20251218T085316Z
UID:23993-1764761400-1764765000@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: 'Programming quantum matter made with light and atoms'
DESCRIPTION:Speaker: Cristian Tabares \n\nVenue & Time: 11:30 / Gray Room 3 \n\nAbstract: Current experimental quantum devices do not yet meet the requirements for building fault-tolerant quantum computers\, but they can still be used to address many-body problems as analogue quantum simulators. Furthermore\, recent experimental advances [1-4] are enabling these simulators to operate in a programmable manner [5]\, where their dynamics can be used as resources to generate a set of (non-universal) quantum gates. These controllable systems are able to generate highly entangled states\, but a natural question is how to use these resources for quantum simulation purposes.\n\n\nIn this seminar we will discuss two different approaches. The first one will be based on state preparation\, demonstrating how a classical device can be used to assist the analogue quantum simulator in the task of many-body state preparation [6\,7] with variational algorithms. We will focus on fermionic atoms in optical lattices [8]\, constructing for ground-state preparation of local and extended Fermi-Hubbard models that show considerable improvements with respect to equivalent adiabatic methods. Then\, in the second part of the talk\, we will introduce an algorithm specifically tailored for analog quantum simulators to accurately recover their ground state properties [9]. Using only global time evolution under a target Hamiltonian\, our algorithm avoids the need for local control that is typically required in conventional quantum phase estimation.\n\n\nThese results provide programmable quantum simulators with a new set of tools that further leverage their current capabilities. Overall\, our work opens new avenues for analog simulators to make a wider and more efficient exploration of their relevant many-body Hilbert space.\n\n\n\n[1] X. Zhang et al.\, Science 379\, 278-283 (2023). \n[2] C. Kokail et al.\, Nature 569\, 355–360 (2019). \n[3] S. Ebadi et al.\, Nature 595\, 227–232 (2021). \n[4] D. Bourgund et al.\, Nature 637\, 57–62 (2025). \n[5] A. J. Daley et al.\, Nature 607\, 667–676 (2022). \n[6] C. Tabares\, A. Muñoz de las Heras\, L. Tagliacozzo\, D. Porras\, and A. González-Tudela\, Phys. Rev. Lett. 131\, 073602 (2023). \n[7] A. Muñoz de las Heras\, C. Tabares\, J. Schneider\, L. Tagliacozzo\, D. Porras\, and A. González-Tudela.\, Phys. Rev. Research 6\, 013299 (2024). \n[8] C. Tabares\, C. Kokail\, P. Zoller\, D. González-Cuadra and A. González-Tudela\, PRX Quantum 6\, 030356 (2025). \n[9] C. Tabares\, D. S. Wild\, J. I. Cirac\, P. Zoller\, A. Gonzalez-Tudela\, and D. González-Cuadra\, arXiv:2511.04434 (2025).
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-programming-quantum-matter-made-with-light-and-atoms/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251204T120000
DTEND;TZID=Europe/Madrid:20251204T130000
DTSTAMP:20260405T224700
CREATED:20251128T160428Z
LAST-MODIFIED:20251128T160523Z
UID:23984-1764849600-1764853200@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'On the K-point in moduli space'
DESCRIPTION:Speaker: Alessandra Grieco (IFT)\n\nVenue & Time: Red Room / 12:00\n\nAbstract: We study a class of infinite-distance loci\, referred to as K-points\, in one-parameter complex-structure moduli spaces of type IIB string theory compactified on Calabi-Yau manifolds. We show that around K-points the effective four-dimensional supergravity exhibits certain unusual properties. The two most prominent being that the leading order dependence of the prepotential on the gauge couplings is non-perturbative and that the leading gauge kinetic terms in the action vanish when evaluated on an anti self-dual graviphoton background. These properties are shared with the conifold locus in moduli space\, rather than the large complex-structure locus. The conifold locus is well-known to arise from integrating out a charged BPS state\, and so the similarities suggest that the K-point also arises from integrating out a BPS state. We develop such an interpretation\, finding that it corresponds to a BPS state which is extremely light\, whose mass in Planck units is doubly-exponentially small in the distance to the K-point. The state behaves as if it had complex charges\, or as if it couples to the self-dual and anti self-dual parts of the graviphoton differently. Assuming such an integrating-out scenario is indeed the correct physics for the K-point\, we discuss the implications for our understanding of infinite distances in moduli space and for the Swampland Distance Conjecture.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-on-the-k-point-in-moduli-space/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251204T150000
DTEND;TZID=Europe/Madrid:20251204T160000
DTSTAMP:20260405T224700
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:20251204T170000
DTEND;TZID=Europe/Madrid:20251204T180000
DTSTAMP:20260405T224700
CREATED:20251128T155727Z
LAST-MODIFIED:20251128T160503Z
UID:23979-1764867600-1764871200@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Field Theories with Superconductor Solutions'
DESCRIPTION:Lorenzo Paoloni (IFT) will present :“Field Theories with Superconductor Solutions”\, Nuovo Cim. 19 (1961) 154–164 de J. Goldstone. \nVenue & Time: Blue Room / 17:00 \n \nAbstract: The conditions for the existence of non-perturbative type « superconductor » solutions of field theories are examined. A non-covariant canonical transformation method is used to find such solutions for a theory of a fermion interacting with a pseudoscalar boson. A covariant renormalisable method using Feynman integrals is then given. A « superconductor » solution is found whenever in the normal perturbative-type solution the boson mass squared is negative and the coupling constants satisfy certain inequalities. The symmetry properties of such solutions are examined with the aid of a simple model of self-interacting boson fields. The solutions have lower symmetry than the Lagrangian\, and contain mass zero bosons. \nMore info: https://inspirehep.net/literature/12289
URL:https://www.ift.uam-csic.es/event/old-journal-club-field-theories-with-superconductor-solutions/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251209T093000
DTEND;TZID=Europe/Madrid:20251211T180000
DTSTAMP:20260405T224700
CREATED:20251027T114955Z
LAST-MODIFIED:20251217T111635Z
UID:23481-1765272600-1765476000@www.ift.uam-csic.es
SUMMARY:31st Xmas Workshop
DESCRIPTION:From December 9th to December 11th 2025 we will celebrate the XXXI edition of our annual Christmas Workshop at the Instituto de Física Teórica (IFT) UAM-CSIC. \nLeading experts will meet at the IFT to discuss recent developments in (astro) particle physics\, phenomenology\, cosmology\, string theory\, and quantum information. \nMore info. \nOrganizers: \n\n\nAlejandro Bermudez\nDavid Cerdeño\nGregorio Herdoíza\nMiguel Montero\nPilar Coloma\nSven Heinemeyer\nYashar Akrami\n\n\n\n\nConfirmed speakers: \n\nMassimo Bianchi (Rome)\nDiego Blas (IFAE)\nRebecca Gozzini (IFIC)\nAram Harrow (MIT)\nYolanda Lozano (U Oviedo)\nGonzalo Palma (Chile U.)\nRyan Plestid (CERN)\nCarsten Urbach (U. Bonn)\nAlexander Westphal DESY)\nGiulia Zanderighi (MPI Munich)\n\n\n\n\n\nposterIFTXmas25.pdf
URL:https://www.ift.uam-csic.es/event/31st-xmas-workshop/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Workshops
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251212T093000
DTEND;TZID=Europe/Madrid:20251212T140000
DTSTAMP:20260405T224700
CREATED:20251027T115407Z
LAST-MODIFIED:20251211T132747Z
UID:23485-1765531800-1765548000@www.ift.uam-csic.es
SUMMARY:Joint Colloquium IFT + ICMAT: 'Geometry of gauge theories in two dimensions'
DESCRIPTION:Joint ICMAT-IFT Colloquium \nAfter the colloquium\, the traditional “Farewell to the Year” party will take place in the CFTMAT cafeteria. \nSpeaker:  Oscar García-Prada (ICMAT-CSIC)\nDate:  Friday\, 12 December 2025 – 12:00\nPlace:  Blue Room \nAbstract: \nI will describe several geometric aspects of different gauge theories on Riemann surfaces that originate in four-dimensional Yang–Mills theories. A common theme is the appearance of various types of Higgs fields. I will provide some basic mathematical and historical background.
URL:https://www.ift.uam-csic.es/event/joint-colloquium-ift-icmat-2/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251215T150000
DTEND;TZID=Europe/Madrid:20251215T160000
DTSTAMP:20260405T224700
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:20251216T150000
DTEND;TZID=Europe/Madrid:20251216T160000
DTSTAMP:20260405T224700
CREATED:20251212T150514Z
LAST-MODIFIED:20251218T085316Z
UID:24132-1765897200-1765900800@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: 'How large can lepton mixing be?'
DESCRIPTION:Speaker: Sergio Rodríguez Benítez (IFT) \nVenue & Time: Grey Room 3 / 15:00 \nAbstract: We show that\, contrary to common expectations\, the observed charged leptons can have a substantial mixing with new heavier fermions\, at the level of 20%. This can happen\, in the language of effective theories\, when the effect of mixing with heavier fermions vanishes at tree level in operators of mass-dimension 6 (or it is suppressed by the small charged lepton masses)\, a cancellation that can be naturally ensured by symmetries. Using a model that realizes this scenario we consider all current direct and indirect constraints and show that experimental constraints on the mixing are so mild that\, given the current direct limit on the mass of the heavy fermions\, theoretical considerations become the leading current constraints on the mixing. We also estimate the sensitivity to the mixing at future experiments\, including the high-luminosity phase of the LHC and\, most notably\, the FCCee\, and FCC-hh. We find a pattern in which the reach of direct searches in hadron machines makes theoretical considerations lead the limits while the precision of lepton machines can beat these theoretical considerations. We find that the FCC can finally reach per milleprecision in the mixing squared of the charged leptons. \n 
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-how-large-can-lepton-mixing-be/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260114T150000
DTEND;TZID=Europe/Madrid:20260114T170000
DTSTAMP:20260405T224700
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:20260115T120000
DTEND;TZID=Europe/Madrid:20260115T130000
DTSTAMP:20260405T224700
CREATED:20260108T233656Z
LAST-MODIFIED:20260109T064725Z
UID:24167-1768478400-1768482000@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Exotic Branes and Symmetries of String Theory'
DESCRIPTION:Speaker: Andriana Makridou (IFT) \nVenue & Time: Red Room / 12:00 \nAbstract: Are duality transformations symmetries of string theory? For AdS space-time the answer is\nno for generic asymptotic values of the moduli\, since the duality symmetry is broken explicitly\nin the dual conformal field theory. In contrast\, in string theory in flat space-time\, monodromy\naround codimension two exotic branes show that duality transformations are spontaneously\nbroken discrete gauge symmetries with observable consequences\, provided macroscopic loops\nof these branes are not hidden behind an event horizon. We discuss how this can be achieved\nand how the situation in flat space-time differs from that in AdS space-time. We also discuss\nobservability of codimension two non-BPS branes and codimension one BPS and non-BPS\nbranes. Based on [2512.19068].
URL:https://www.ift.uam-csic.es/event/sps-journal-club-exotic-branes-and-symmetries-of-string-theory/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260115T120000
DTEND;TZID=Europe/Madrid:20260115T130000
DTSTAMP:20260405T224700
CREATED:20260108T235522Z
LAST-MODIFIED:20260112T110919Z
UID:24173-1768478400-1768482000@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: 'Bubble velocities in local equilibrium from a pseudopotential'
DESCRIPTION:Speaker: Eric Madge\, IFT \nVenue&Time: 12:00 / Grey room 3 \nAbstract: We present a new method to estimate terminal bubble velocities during first-order phase transitions in a plasma in local equilibrium. The method relies on calculating the extrema of a modified potential function for the scalar field undergoing the transition. The shape of this function\, which we refer to as the “pseudopotential”\, changes with the wall velocity\, and if the dependence of the fluid temperature on scalar gradients is weak—which is confirmed to hold with high accuracy in concrete examples—the difference in pseudopotential between two appropriate extrema gives the net outward pressure acting on the bubble wall. It then follows that the correct terminal bubble velocities are those that lead to degenerate minima in the pseudopotential. This allows to compute bubble velocities without having to solve the equation of motion of the scalar field\, and in contrast to other methods this can be done without relying on simplified equations of state for the plasma or without choosing a specific ansatz for the scalar field profile. We illustrate the method in a singlet extension of the Standard Model\, computing the net outward pressure as a function of the wall velocity. We confirm the dip in outward pressure found in the literature for hybrid bubbles\, which implies that stationary deflagrations are stable\, while their detonation counterparts are unstable
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-bubble-velocities-in-local-equilibrium-from-a-pseudopotential/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260115T150000
DTEND;TZID=Europe/Madrid:20260115T160000
DTSTAMP:20260405T224700
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:20260120T140000
DTEND;TZID=Europe/Madrid:20260120T150000
DTSTAMP:20260405T224700
CREATED:20260116T125647Z
LAST-MODIFIED:20260116T125647Z
UID:24212-1768917600-1768921200@www.ift.uam-csic.es
SUMMARY:Cosmology Journal Club
DESCRIPTION:Every Tuesday at 2:00 PM in the discussion room on the 5th floor. \nJoin the IFT cosmology/gravity journal club at benty-fields.com to vote for papers and volunteer to present them.
URL:https://www.ift.uam-csic.es/event/cosmology-journal-club-10/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260122T120000
DTEND;TZID=Europe/Madrid:20260122T130000
DTSTAMP:20260405T224700
CREATED:20260116T122902Z
LAST-MODIFIED:20260116T123748Z
UID:24200-1769083200-1769086800@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'K-Points and Type IIB/Heterotic Duality with NS5-Branes'
DESCRIPTION:Speaker: Lorenzo Paoloni (IFT) \nVenue & Time: Red Room / 12:00 \nAbstract: We revisit type II_0 limits in the vector multiplet moduli space of compactifications of Type IIB string theory on Calabi-Yau threefolds. These limits are special because they cannot be described using mirror symmetry. While we showed in previous work that the gravitational duality frame emerging in such limits corresponds to a weakly coupled heterotic string compactified on K3 times a string-sized torus\, our focus here is on the additional field theory sectors that decouple from gravity in these asymptotic regimes. Concretely\, we argue that\, in the dual heterotic description\, these field theory sectors correspond to spacetime-filling NS5-branes wrapping the heterotic torus. The existence of such non-perturbative field theory sectors manifests itself in an exponential dependence of the prepotential on the heterotic dilaton at leading order. Applied to K-point limits in one-parameter moduli spaces\, our results imply that these limits are in perfect agreement with the Distance and Emergent String Conjectures. More precisely\, the light tower of states predicted by the Distance Conjecture arises from excitations of a weakly coupled heterotic string compactified to four dimensions on a background containing spacetime-filling NS5-branes.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-k-points-and-type-iib-heterotic-duality-with-ns5-branes/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260122T120000
DTEND;TZID=Europe/Madrid:20260122T130000
DTSTAMP:20260405T224700
CREATED:20260116T123236Z
LAST-MODIFIED:20260116T123708Z
UID:24198-1769083200-1769086800@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club
DESCRIPTION:Every Thursday at 12:00 in Grey Room 3.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-5/
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260122T150000
DTEND;TZID=Europe/Madrid:20260122T160000
DTSTAMP:20260405T224700
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:20260122T170000
DTEND;TZID=Europe/Madrid:20260122T180000
DTSTAMP:20260405T224700
CREATED:20260116T123614Z
LAST-MODIFIED:20260116T123646Z
UID:24199-1769101200-1769104800@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Particle Spectrum in Quantum Field Theory'
DESCRIPTION:Alejandro Puga (IFT) will present “Particle Spectrum in Quantum Field Theory”  de Alexander M. Polyakov (JETP Lett. 20 (1974) 194-195)\n\nAbstract: We investigate the nonperturbative structure of quantum field theories and its consequences for the physical spectrum of excitations. Emphasis is placed on the role of instantons—topologically nontrivial field configurations—which contribute essentially to tunneling processes and mass generation beyond perturbation theory. The analysis demonstrates how instanton effects modify correlation functions and lead to qualitatively new features in the particle spectrum\, highlighting the deep connection between topology\, symmetry\, and dynamics in quantum field theory.\n\nVenue & Time: Blue Room / 17:00
URL:https://www.ift.uam-csic.es/event/old-journal-club-particle-spectrum-in-quantum-field-theory/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260127T140000
DTEND;TZID=Europe/Madrid:20260127T150000
DTSTAMP:20260405T224700
CREATED:20260123T133337Z
LAST-MODIFIED:20260123T133427Z
UID:24294-1769522400-1769526000@www.ift.uam-csic.es
SUMMARY:Cosmology Journal Club
DESCRIPTION:Every Tuesday at 2:00 PM in the discussion room on the 5th floor. \nJoin the IFT cosmology/gravity journal club at benty-fields.com to vote for papers and volunteer to present them.
URL:https://www.ift.uam-csic.es/event/cosmology-journal-club-11/
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260129T110000
DTEND;TZID=Europe/Madrid:20260129T130000
DTSTAMP:20260405T224700
CREATED:20260126T091747Z
LAST-MODIFIED:20260126T091759Z
UID:24298-1769684400-1769691600@www.ift.uam-csic.es
SUMMARY:ML-AI-HPC Jounal Club: 'Probabilistic modeling and Bayesian inference for collider data'
DESCRIPTION:Title: ‘Probabilistic modeling and Bayesian inference for collider data’ \nSpeaker: Santiago Tanco (IFLP-CONICET/UNLP) \nVenue&Time: Gray Room 1 / 11:00 \n 
URL:https://www.ift.uam-csic.es/event/ml-ai-hpc-jounal-club-probabilistic-modeling-and-bayesian-inference-for-collider-data/
LOCATION:Gray Room 1\, Instituto de Física Teórica\, C/ Nicolás Cabrera 13-15\, Cantoblanco\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260129T113000
DTEND;TZID=Europe/Madrid:20260129T163000
DTSTAMP:20260405T224700
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:20260129T120000
DTEND;TZID=Europe/Madrid:20260129T130000
DTSTAMP:20260405T224700
CREATED:20260122T130534Z
LAST-MODIFIED:20260122T130751Z
UID:24262-1769688000-1769691600@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Mapping moduli across heterotic conifolds'
DESCRIPTION:Strings\, Pheno and the Swampland Journal Club\n\n\nTitle: ‘Mapping moduli across heterotic conifolds’\n\n\nSpeaker: Christian Aoufia (IFT)\n\n\nVenue & Time: Red Room / 12:00\n\n\nAbstract: In this work\, we provide evidence for a duality between 4-dimensional Calabi-Yau compactifications of the heterotic string\, in which the base manifolds are linked by a conifold transition. In recent work\, a geometric proposal was put forward for how 5-branes and gauge bundles are carried across such transitions. It was observed that compactifications connected in this way lead to 4-dimensional effective theories with the same massless spectrum. Here we provide much stronger evidence that these heterotic conifold transitions do indeed lead to dual theories. We construct a duality map between the field spaces of the two compactifications and use it to demonstrate the agreement of large numbers of holomorphic functions appearing in the definition of the effective theories. In an example\, we show that 147\,440 independent superpotential Yukawa couplings agree across the duality as holomorphic functions of the moduli. In certain special cases\, the putative duality studied here reduces to the target space duality of (0\,2) gauged linear sigma models.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-mapping-moduli-across-heterotic-conifolds/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260129T120000
DTEND;TZID=Europe/Madrid:20260129T130000
DTSTAMP:20260405T224700
CREATED:20260123T120019Z
LAST-MODIFIED:20260123T120019Z
UID:24286-1769688000-1769691600@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: 'GeV-scale QCD Axion'
DESCRIPTION:Title: ‘GeV-scale QCD Axion’\n\nSpeaker: Thomas Steingasser (IFT)\n\nVenue & Time: 12:00 / Gray Room 3\n\nAbstract: In order to solve the strong CP problem\, we study the possibility that the Peccei–Quinn symmetry is broken below the QCD scale. We find that a QCD axion can be above GeV\, and may be among the observed η resonances. It is immune to quantum gravity corrections. The only fermion that has a U (1) Peccei–Quinn charge is the right-handed up quark. Flavor-changing neutral currents are surprisingly small\, except for a possible but not necessary contribution to D0–D0 mixing. All accelerator and astrophysical limits can be evaded. The most significant constraint is the mass splitting between π± and π0. In a UV completed model\, LHC can look for a dijet resonance in u ̄u\,u  ̄d\, d ̄u channels.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-gev-scale-qcd-axion/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260129T150000
DTEND;TZID=Europe/Madrid:20260129T160000
DTSTAMP:20260405T224700
CREATED:20251128T152607Z
LAST-MODIFIED:20260123T125214Z
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.
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:20260129T170000
DTEND;TZID=Europe/Madrid:20260129T180000
DTSTAMP:20260405T224700
CREATED:20260123T120447Z
LAST-MODIFIED:20260123T120531Z
UID:24288-1769706000-1769709600@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Topological Quantization and Cohomology'
DESCRIPTION:Gonzalo F. Casas (IFT) will present ‘Topological Quantization and Cohomology‘ by Orlando Álvarez  Commun.Math.Phys. 100 (1985) 279 \nAbstract:  \nThe relationships between topological charge quantization\,Lagrangians and various cohomology theories are studied. A very general criterion for charge quantization is developed andapplied to various physical models. The relationship betweencohomology and homotopy is discussed. \nMore info: https://inspirehep.net/literature/206164
URL:https://www.ift.uam-csic.es/event/old-journal-club-topological-quantization-and-cohomology/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
ATTACH;FMTTYPE=image/png:https://www.ift.uam-csic.es/wp-content/uploads/2026/01/OJC_GON.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260202T150000
DTEND;TZID=Europe/Madrid:20260202T160000
DTSTAMP:20260405T224700
CREATED:20251128T152750Z
LAST-MODIFIED:20260202T161633Z
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. \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:20260203T140000
DTEND;TZID=Europe/Madrid:20260203T150000
DTSTAMP:20260405T224700
CREATED:20260202T072324Z
LAST-MODIFIED:20260202T072324Z
UID:24324-1770127200-1770130800@www.ift.uam-csic.es
SUMMARY:Cosmology Journal Club
DESCRIPTION:Every Tuesday at 2:00 PM in the discussion room on the 5th floor. \nJoin the IFT cosmology/gravity journal club at benty-fields.com to vote for papers and volunteer to present them.
URL:https://www.ift.uam-csic.es/event/cosmology-journal-club-12/
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260204T113000
DTEND;TZID=Europe/Madrid:20260204T123000
DTSTAMP:20260405T224700
CREATED:20260202T071236Z
LAST-MODIFIED:20260202T071236Z
UID:24321-1770204600-1770208200@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: Continuous and field tensor network states
DESCRIPTION:Speaker: Albert Gasull\, Leiden University\n\nVenue & Time: Grey Room 3 / 11:30\n\nTitle: ‘Continuous and field tensor network states’\nAbstract: Tensor network methods have provided us with a powerful set of tools with which to study strongly interacting many-body systems on the lattice. Understanding the limitations of this ansatz is paramount for the success of both numerical algorithms and exact analytical representations of the many-body wavefunction. In recent years\, several generalizations making use of different notions of the continuum have appeared in the literature to tackle such different limitations. Firstly\, continuous tensor network states (cTNS) is an ansatz that allows us to work directly in the continuum to answer questions related to quantum field theories\, removing the need for sending the lattice spacing to zero in standard tensor network approaches. Secondly\, field tensor network states (fTNS) aim to provide an exact tensor network approach to the analytical description of chiral gapped topological states in two spatial dimensions\, such as the Laughlin wavefunction. While these states had been previously considered to be out of reach for the most prominent two dimensional tensor network\, projected entangled pair states\, by upgrading the virtual space of the network to an infinite dimensional one\, we circumvent the previous no-go theorems to provide the first exact representations. In this talk\, I will present an overview of both cTNS and fTNS. I will present the main ideas behind both generalizations and relation to quantum field theories. I will also showcase some of the applications that we are currently working on\, as well as some of the problems that one encounters along the way. This talk is based on both published and ongoing work with Arkadiusz Bochniak\, Germán Sierra and Ignacio Cirac.
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-continuous-and-field-tensor-network-states/
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
END:VCALENDAR