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X-WR-CALNAME:Instituto de Física Teórica
X-ORIGINAL-URL:https://www.ift.uam-csic.es
X-WR-CALDESC:Events for Instituto de Física Teórica
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TZID:Europe/Madrid
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DTSTART:20250330T010000
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DTSTART:20251026T010000
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DTSTART:20260329T010000
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DTSTART:20261025T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260504T150000
DTEND;TZID=Europe/Madrid:20260504T160000
DTSTAMP:20260718T163126
CREATED:20260129T125910Z
LAST-MODIFIED:20260504T081933Z
UID:24312-1777906800-1777910400@www.ift.uam-csic.es
SUMMARY:Seminar: 'Gravitational waves from phase transitions in the early Universe: sound waves and MHD turbulence'
DESCRIPTION:Title: Gravitational waves from phase transitions in the early Universe: sound waves and MHD turbulence \nSpeaker: Alberto Roper Pol (Geneva) \nVenue&Time: Red Room / 15:00 \nAbstract:  Gravitational waves (GWs) can be produced by a first-order phase transition in the early Universe via the fluid perturbations induced in the primordial plasma by the expansion and collision of broken-phase bubbles. I will review the production of GWs by the anisotropic stresses of velocity and magnetic fields induced in a first-order phase transition and present recent developments on the analytical estimates and numerical simulations that address the stochastic GW background produced by acoustic motion (sound waves) and magnetohydrodynamic (MHD) turbulence. These GWs could be detectable by current and future GW detectors like LISA or PTA\, potentially providing us with direct clean information of the physics at the high energies of the early Universe and probing beyond the Standard Model physics. In addition\, the presence of magnetic fields at a phase transition leads to coupled non-linear fluid perturbations\, described by MHD turbulence\, that will impact the cosmological GW background. The study of these effects can be used to put constraints on primordial magnetic fields. These fields would evolve until present time and leave observable imprints in\, for example\, the CMB and in the cosmic voids of the large-scale structure of the Universe\, allowing us to combine GW observations with other cosmological and astrophysical observations in a multi-messenger approach.
URL:https://www.ift.uam-csic.es/event/ift-seminar-alberto-roper-pol-geneva/
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:20260506T110000
DTEND;TZID=Europe/Madrid:20260506T120000
DTSTAMP:20260718T163126
CREATED:20260429T082932Z
LAST-MODIFIED:20260429T083036Z
UID:24957-1778065200-1778068800@www.ift.uam-csic.es
SUMMARY:Seminar: 'Are string vacua connected?' by Ashoke Sen (ICTS-Infosys)
DESCRIPTION:Title: ‘Are string vacua connected?’\n\nSpeaker: Ashoke Sen (ICTS-Infosys)\n\nVenue&Time: 11:00 / Blue Room\n\nAbstract: String theory has many vacua. We shall examine the question of whether these vacua are connected from an experimentalist’s perspective.\n\nAshoke Sen is the ICTS-Infosys Madhava Chair Professor at the International Centre for Theoretical Sciences\, Bengaluru.\nHis major honours include the ICTP Dirac Medal (2014)\, Breakthrough Prize in Fundamental Physics (2012)\, and the Infosys Prize in Mathematical Sciences (2009). He has also received the Padma Bhushan (2013) and the Padma Shri (2001)\, and is a Fellow of the Royal Society.
URL:https://www.ift.uam-csic.es/event/seminar-are-string-vacua-connected-by-ashoke-sen-icts-infosys/
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
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260507T150000
DTEND;TZID=Europe/Madrid:20260507T160000
DTSTAMP:20260718T163126
CREATED:20260420T102805Z
LAST-MODIFIED:20260420T102828Z
UID:24930-1778166000-1778169600@www.ift.uam-csic.es
SUMMARY:Seminar by Christian Northe (Institute of Physics\, Prague)
DESCRIPTION:Title: Entanglement through topological interfaces in CFT revisited \nSpeaker: Christian Northe (Institute of Physics\, Prague) \nVenue&Time: Red Room / 15:00 \nAbstract: Present theoretical predictions for the entanglement entropy through topological defects are violated in numerical simulations of critical systems. In this talk\, I discuss a paradigm shift in the preparation of reduced density matrices in the presence of topological defects\, and emphasize the role of defect networks with which they can be dressed. Grouplike and duality defects are considered in detail for the Ising model\, establishing agreement with all numerically found entanglement entropies. Since this new construction functions at the level of reduced density matrices\, it accounts for topological defects beyond the entanglement entropy to other entanglement measures. The framework employs boundary conformal field theory techniques to implement the factorization of Hilbert space\, which I recapitulate at the beginning of the talk and discuss its relation with the entanglement spectrum.
URL:https://www.ift.uam-csic.es/event/seminar-by-christian-northe-institute-of-physics-prague/
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:20260511T150000
DTEND;TZID=Europe/Madrid:20260511T160000
DTSTAMP:20260718T163126
CREATED:20260310T094850Z
LAST-MODIFIED:20260511T080840Z
UID:24578-1778511600-1778515200@www.ift.uam-csic.es
SUMMARY:Seminar: 'Primordial Black Holes -- Positivist Perspective\, Quantum Quiddity and Galaxy Genesis'
DESCRIPTION:Title: ‘Primordial Black Holes — Positivist Perspective\, Quantum Quiddity and Galaxy Genesis’ \nSpeaker: Florian Kühnel\, (TU Dortmund & LMU Munich) \nVenue&Time: Red Room / 15:00 \nAbstract: Primordial black holes are black holes that may have formed in the early Universe. Their masses potentially span a range from as low as the Planck mass up to many orders of magnitude above the solar mass. This\, in particular\, includes those black holes recently discovered through gravitational waves\, and (part of) these may conceivably be of primordial origin. After a general introduction on primordial black holes\, I review the observational hints for their existence — from a variety of lensing\, dynamical\, accretion and gravitational-wave effects. As I will show\, all of these (over 20) may be explained by a single and simple unified model\, naturally shaped by the thermal history of the Universe. If time permits\, I discuss how recent advances in our understanding of quantum effects in black holes impact PBHs. This prominently concerns deviations from Hawking radiation in the form of the memory-burden effect. Finally\, I will elucidate on the role primordial black holes have on early galaxy and star formation.
URL:https://www.ift.uam-csic.es/event/seminar-title-tba-florian-kuhnel-tu-dortmund-lmu-munich/
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:20260514T120000
DTEND;TZID=Europe/Madrid:20260514T130000
DTSTAMP:20260718T163126
CREATED:20260330T090749Z
LAST-MODIFIED:20260513T152425Z
UID:24670-1778760000-1778763600@www.ift.uam-csic.es
SUMMARY:Seminar: 'Perturbative aspect of electroweak phase transitions in the Early Universe'
DESCRIPTION:Title: ‘Perturbative aspect of electroweak phase transitions in the Early Universe’\n\n\n\nSpeaker: Andrii Dashko (DESY)\n\n\nVenue&Time: Blue Room / 12:00\n\n\nAbstract: We present a study of the perturbative description of thermally driven electroweak phase transitions (EWPT) in the early universe. Focusing on strong first-order transitions\, which are relevant for gravitational wave cosmology\, we examine the dimensional reduction as a tool for a precise and systematic description focusing on the running of effective parameters within the effective field theory (EFT)\, and the impact of higher-dimensional operators. This allows us to assess the range of validity and theoretical uncertainties of the EFT approach. We demonstrate these results with applications to the Standard Model Effective Field Theory (SMEFT) and singlet extensions of the Standard Model\, both of which can realize strong EWPT.
URL:https://www.ift.uam-csic.es/event/seminar-by-andrii-dashko-desy/
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
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260518T150000
DTEND;TZID=Europe/Madrid:20260518T160000
DTSTAMP:20260718T163126
CREATED:20251128T155105Z
LAST-MODIFIED:20260504T100633Z
UID:23975-1779116400-1779120000@www.ift.uam-csic.es
SUMMARY:Seminar: 'On the evidence for elastic interactions in the dark sector'
DESCRIPTION:Title: ‘On the evidence for elastic interactions in the dark sector’ \nSpeaker: Jose Beltrán Jiménez\, University of Salamanca. \nVenue & Time: Red Room / 15:00 \nAbstract: The increasing quality of cosmological data has revealed > some tensions among different probes that could be signalling the necessity of incorporating new physics into our cosmological model. One particularly intriguing possibility is the existence of elastic interactions between dark matter and dark energy. Not only do these interactions provide a natural mechanism to relief cosmological tensions\, but there is also compelling observational evidence for them\, to the extent that a detection could even be claimed. I wil review the potential of these scenarios in relation to the cosmological tensions and discuss distinctive signatures that can be probed with future data\, thus providing a smoking gun for these interactions.
URL:https://www.ift.uam-csic.es/event/seminar-by-jose-beltran-salamanca/
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:20260521T150000
DTEND;TZID=Europe/Madrid:20260521T160000
DTSTAMP:20260718T163126
CREATED:20260206T110232Z
LAST-MODIFIED:20260518T073544Z
UID:24351-1779375600-1779379200@www.ift.uam-csic.es
SUMMARY:Seminar: 'Exploring Effective Theories of Gauged Chiral Symmetries at the LHC and Beyond'
DESCRIPTION:Title: Exploring Effective Theories of Gauged Chiral Symmetries at the LHC and Beyond \nSpeaker: Felix Yu (Mainz U.) \nVenue & Time: Red Room / 15:00 \nAbstract: I discuss theoretical issues with constructing effective theories of gauged chiral symmetries\, taking a quark-universal U(1)_B symmetry as an example.  I will review the phenomenology of the Z-Z’-photon vertex and point out novelties regarding a non-renormalization theorem and connections to electroweak loop calculations and dimensional regularization. I also present the collider signatures from the exotic scalar sector and the characteristic nature of non-decoupling chiral matter.
URL:https://www.ift.uam-csic.es/event/seminar-by-felix-yu-mainz-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:20260525T150000
DTEND;TZID=Europe/Madrid:20260525T160000
DTSTAMP:20260718T163126
CREATED:20260520T084237Z
LAST-MODIFIED:20260525T122737Z
UID:25075-1779721200-1779724800@www.ift.uam-csic.es
SUMMARY:Seminar: 'Weak Particles with a strong impact'
DESCRIPTION:Title: ‘Weak Particles with a strong impact’ \nSpeaker: Aritra Gupta (Krea University\, India) \nVenue&Time: Red Room / 15:00 \nAbstract: Dark matter and neutrinos are among the most elusive particles in nature\, yet they play a central role in the evolution of the Universe. Their extremely weak interactions make them difficult to detect\, but also allow them to probe environments inaccessible to ordinary matter. \nIn this colloquium\, I will discuss how astrophysical systems and neutrino observatories can be used to explore the physics of dark matter and neutrinos beyond the Standard Model. I will present scenarios where dark matter and neutrino physics are intimately connected\, leading to observable consequences in cosmology and astroparticle experiments. I will also discuss how dark matter accumulated inside compact stellar environments can significantly modify supernova cooling along with other detectable indirect signatures. Throughout the talk\, I will highlight how compact stars\, neutrino detectors\, and astrophysical observations together provide new windows into the dark sector.
URL:https://www.ift.uam-csic.es/event/seminar-weak-particles-with-a-strong-impact/
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260528T150000
DTEND;TZID=Europe/Madrid:20260528T160000
DTSTAMP:20260718T163127
CREATED:20260330T092531Z
LAST-MODIFIED:20260330T092531Z
UID:24676-1779980400-1779984000@www.ift.uam-csic.es
SUMMARY:Seminar by Marco Finetti (U. Aveiro)
DESCRIPTION:Title: ‘First Order Phase Transitions and Gravitational Waves’ \nVenue&Time: Red Room / 15:00 \nSpeaker: Marco Finetti (U. Aveiro) \nAbstract: The Laser Interferometer Space Antenna (LISA) will be the first space-based gravitational wave (GW) detector\, opening a new observational window for both astrophysics and early-Universe cosmology. Operating in the millihertz band\, it will probe a rich superposition of GW signals. Astrophysical population models predict a sufficient number of signals in the LISA band to blend together and form an irresolvable Galactic foreground noise. In addition\, a stochastic gravitational wave background (SGWB) of cosmological origin could add an unknown component to the measured noise. In this talk\, I will assess the bias induced on the parameter estimation of stochastic signals\, arising from the unresolved binaries buried within the cosmological signal. Using a representative SGWB model\, I will quantify the impact of this effect on the reconstruction of the foreground template parameters and\, most importantly\, on those of the SGWB model itself. Neglecting inter-template correlations can lead to significan biases\, and\, for several benchmark cases\, those biases exceed the statistical reconstruction uncertainties. These findings expose a key limitation of existing template-based strategies and indicate that unbiased component separation will likely require additional information\, such as constraints from resolved sources obtained through global-fit analyses.
URL:https://www.ift.uam-csic.es/event/seminar-by-marco-finetti-u-aveiro/
CATEGORIES:Scientific activities,Seminars
END:VEVENT
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