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X-ORIGINAL-URL:https://www.ift.uam-csic.es
X-WR-CALDESC:Events for Instituto de Física Teórica
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260921T110000
DTEND;TZID=Europe/Madrid:20260921T130000
DTSTAMP:20260920T184821
CREATED:20260908T111916Z
LAST-MODIFIED:20260918T074317Z
UID:25541-1789988400-1789995600@www.ift.uam-csic.es
SUMMARY:PhD Defense by Indira Ocampo Justiniano: A machine learning approach for unraveling the nature of dark matter and dark energy
DESCRIPTION:Title: A machine learning approach for unraveling the nature of dark matter and dark energy \nVenue & Time: Orange Room / 11:00-13:00 \n\nAbstract: Cosmology nowadays is benefiting from an exponential increase of data\, transforming into a precision science. This will help us understand better two of the most important open issues in theoretical physics\, namely understanding the nature of dark matter and dark energy. However\, the vast quantity and quality of the data collected from present and upcoming cosmological surveys has become so demanding\, that sophisticated computational tools are required. As a result\, machine learning methods are being implemented for data analysis and model constraints with the hope of alleviating tensions in the parameters inferred from different cosmological probes. A significant challenge remains in the complexity of these models: as architectures become more accurate\, this usually comes with the trade-off of their interpretability. This can lead to a lack of transparency and trustworthiness in a field that demands validation based on physical laws. The research presented in this thesis focuses on different architectures based on neural networks to search for signatures of physics beyond ΛCDM\, with a particular emphasis on interpretability tools that allow extracting the most informative data for the model’s predictions. \nSupervisor: Savvas Nesseris\nA small reception will take place afterwards on the terrace of IMDEA around 13:00.
URL:https://www.ift.uam-csic.es/event/phd-defense-by-indira-ocampo-justiniano-a-machine-learning-approach-for-unraveling-the-nature-of-dark-matter-and-dark-energy/
LOCATION:Orange Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\, Spain
CATEGORIES:PhD Dissertation,Training
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260921T150000
DTEND;TZID=Europe/Madrid:20260921T160000
DTSTAMP:20260920T184821
CREATED:20260821T101946Z
LAST-MODIFIED:20260918T144926Z
UID:25494-1790002800-1790006400@www.ift.uam-csic.es
SUMMARY:Seminar by Georg Weiglein (DESY): "Exploring the Higgs potential and the evolution of the early universe"
DESCRIPTION:Title: Exploring the Higgs potential and the evolution of the early universe \nSpeaker: Georg Weiglein (DESY) \nVenue&Time: Orange Room | 15:00 \nAbstract: The Higgs potential is of central importance for addressing fundamental open questions in our understanding of the dynamics of electroweak symmetry breaking\, its connection to the electroweak phase transition in the early universe and for possible explanations for the observed imbalance between matter and anti-matter in the universe. However\, up to now neither the shape of the Higgs potential that is realised in nature is known nor the underlying physics that actually gives rise to the Higgs potential. The present experimental results from the LHC related to the Higgs potential are confronted with precise theory predictions\, and future prospects for the exploration of the HIggs potential are highlighted. The theoretical uncertainties in predicting the thermal evolution of the early universe and possible gravitational wave signals arising from the electroweak phase transition are discussed.
URL:https://www.ift.uam-csic.es/event/seminar-georg-weiglein-desy/
LOCATION:Orange 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:20260923T113000
DTEND;TZID=Europe/Madrid:20260923T123000
DTSTAMP:20260920T184821
CREATED:20260917T073455Z
LAST-MODIFIED:20260917T073455Z
UID:25614-1790163000-1790166600@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: "Quantum information transitions and the breakdown of non-Abelian topological quantum memories"
DESCRIPTION:Speaker: Pablo Sala (ift)\n\nTitle: “Quantum information transitions and the breakdown of non-Abelian topological quantum memories”\n\nVenue&Time: Gray Room 3 / 11:30\n\nAbstract: How much noise can a system tolerate before encoded quantum information becomes irrecoverable? This question connects quantum error correction to the stability of quantum matter. In this talk\, I will explore the transition between a recoverable and an irrecoverable phase when a quantum many-body system is subject to symmetry-preserving noise. For Abelian symmetries\, this reconstruction becomes essentially classical: local syndrome data captures the relevant information and maps to familiar statistical-mechanics decoding problems. For non-Abelian symmetries\, the situation is qualitatively different. The noisy state retains hidden fusion information that cannot be read from local syndromes alone. This leads naturally to a hierarchy of measurement protocols\, where increasingly nonlocal measurements reveal progressively more of the fusion structure. I will describe how this perspective gives a framework for comparing reconstruction thresholds and developing error correction protocols for the closely related problem of non-Abelian topological quantum memories.
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-quantum-information-transitions-and-the-breakdown-of-non-abelian-topological-quantum-memories/
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:20260924T150000
DTEND;TZID=Europe/Madrid:20260924T160000
DTSTAMP:20260920T184821
CREATED:20260917T072644Z
LAST-MODIFIED:20260917T072644Z
UID:25611-1790262000-1790265600@www.ift.uam-csic.es
SUMMARY:Seminar by Rome Samanta (SSM and INFN Naples)
DESCRIPTION:TBA
URL:https://www.ift.uam-csic.es/event/seminar-by-rome-samanta-ssm-and-infn-naples/
LOCATION:Madrid
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260928T150000
DTEND;TZID=Europe/Madrid:20260928T160000
DTSTAMP:20260920T184821
CREATED:20260914T131958Z
LAST-MODIFIED:20260914T133025Z
UID:25573-1790607600-1790611200@www.ift.uam-csic.es
SUMMARY:Seminar: Alba Cervera Lierta [Barcelona Supercomputing Centre]
DESCRIPTION:TBA
URL:https://www.ift.uam-csic.es/event/seminar-alba-cervera-lierta-barcelona-supercomputing-centre/
LOCATION:Madrid
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260930T111500
DTEND;TZID=Europe/Madrid:20260930T160000
DTSTAMP:20260920T184821
CREATED:20260910T105732Z
LAST-MODIFIED:20260910T105732Z
UID:25553-1790766900-1790784000@www.ift.uam-csic.es
SUMMARY:Polygonal Gravity Seminars
DESCRIPTION:Madrid’s Polygonal Gravity Seminar Series\nWednesday\, September 30th. Red Room (IFT)\n  \n11:15h Welcome coffee \n————————- \n11:30h First talk \nSpeaker: Sameer Murthy (Kingś College\, London) \nTitle: Near-extremal black holes in GR and in string theory \nAbstract:What happens to the thermodynamics of a black hole at very low temperatures as it\napproaches extremality? This question had remained a puzzle for many decades. Recent progress shows\nthat semi-classical physics in the near-extremal limit needs to be revisited due to the appearance\nof nearly gapless modes in the near-horizon of a near-extremal black hole. Upon approaching the\nextremal limit carefully\, one finds that the quantum fluctuations of these gapless modes leads to\nunexpectedly large effects even for a very massive black holes with weakly-curved horizons. In the\nfirst part of this talk\, I will explain this progress and discuss various applications. \nIn the second half of the talk\, I will discuss progress regarding the calculation of entropy of\nsupersymmetric black holes\, which has been one of the big successes of string theory. I will discuss\nhow the counting of entropy in string theory involves a subtlety regarding the supersymmetric index\,\nand how its resolution also involves\, once again\, taking the extremal limit carefully. Finally\, I\nwill discuss how this procedure leads to a new class of supersymmetric solutions corresponding to\nblack holes and black strings. \n————————- \n12:45-14:45 Lunch break and free time \n————————- \n15:00h Second talk \nSpeaker: Luciano Rezzolla (Institute of Theoretical Physics\, Goethe U.\, Frankfurt) \nTitle: Binary Neutron Stars: from macroscopic collisions to microphysics  \nAbstract: I will argue that if black holes represent one the most fascinating implications of\nEinstein’s theory of gravity\, neutron stars in binary system are its richest laboratory\, where\ngravity blends with astrophysics and particle physics. I will discuss the rapid recent progress made\nin modelling these systems and show how the gravitational signal can provide tight constraints on\nthe equation of state and sound speed for matter at nuclear densities\, as well as on one of the most\nimportant consequences of general relativity for compact stars: the existence of a maximum mass.\nFinally\, I will discuss how the merger may lead to a phase transition from hadronic to quark matter.\nSuch a process would lead to a signature in the post-merger gravitational-wave signal and open an\nobservational window on the production of quark matter in the present Universe. \n———————————————– \n16:00h Coffee time \n———————————————– \nMore information about these and following monthly seminars can be found at the  webpage https://sites.google.com/view/polygrav (No registration is needed)
URL:https://www.ift.uam-csic.es/event/polygonal-gravity-seminars-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
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