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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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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251201T150000
DTEND;TZID=Europe/Madrid:20251201T160000
DTSTAMP:20260406T014053
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:20251202T150000
DTEND;TZID=Europe/Madrid:20251202T160000
DTSTAMP:20260406T014053
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:20251204T150000
DTEND;TZID=Europe/Madrid:20251204T160000
DTSTAMP:20260406T014053
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:20251215T150000
DTEND;TZID=Europe/Madrid:20251215T160000
DTSTAMP:20260406T014053
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
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