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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:20250925T120000
DTEND;TZID=Europe/Madrid:20250925T130000
DTSTAMP:20260722T174440
CREATED:20250922T031655Z
LAST-MODIFIED:20251125T081259Z
UID:22807-1758801600-1758805200@www.ift.uam-csic.es
SUMMARY:SPS JC: de Sitter and Machine Learning
DESCRIPTION:SPS Journal Club\n\nSpeaker: Bruno De Luca\n\nVenue&Time: Red Room / 12:00\n\nAbstract: \nThe problem of constructing de Sitter vacua in quantum theories of gravity is constrained by no-go theorems and made computationally challenging by the absence of supersymmetry. A popular approach to make it more tractableis to start from a supersymmetric compactification\, such as on a Calabi-Yau manifold. This simplification comes at the price of greatly restricting the allowed physical sources and possible geometries.\n\nIn this introduction\, I will discuss some of my works on how to break supersymmetry at the compactification scale by directly solving the equations of motion. This allows for more general internal geometries and thus more general physical configurations\, including four-dimensional de Sitter vacua supported by Casimir energy on negatively-curved manifolds\, and scale-separated AdS4 vacua.\n\nHowever\, describing the corresponding geometries in detail can sometimes require to solve Einstein-like PDEs on non-trivial manifolds. This problem is intractable even numerically\, with standard methods. Luckily\, Machine Learning is emerging as a method to overcome these difficulties\, and we will discuss a recent proposal for using Machine Learning techniques to explicitly construct negatively-curved geometries.\n\nTime permitting\, we will also describe the other way around: how we can use insights from physics to design algorithms with broad applicability to Machine Learning and beyond\, focusing on optimization and sampling algorithms obtained from energy-preserving chaotic Hamiltonians with non-standard kinetic terms.\n\n\n\nSome references:\n2501.00093\n2104.13380\n2212.02511\n2201.11137
URL:https://www.ift.uam-csic.es/event/sps-jc-de-sitter-and-machine-learning/
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20250924T113000
DTEND;TZID=Europe/Madrid:20250924T123000
DTSTAMP:20260722T174440
CREATED:20250922T031149Z
LAST-MODIFIED:20251125T081259Z
UID:22804-1758713400-1758717000@www.ift.uam-csic.es
SUMMARY:QIJC: Higher Abelian Quantum Double Models: Introduction to the Characterization and Classification of the Ground State Subspace
DESCRIPTION:Quantum Information Journal Club \nSpeaker: Javier Ignacio Lorca Espiro (Universidad de la Frontera\, Chile) \nVenue&Time: Grey Room 3 / 11:30 AM \nAbstract: Higher dimensional abelian quantum double models have been shown to be well defined in any finite dimension and exhibit the characteristic behavior of SPT phases models. In this talk\, we will introduce the problem and discuss the characterization of the topological ground state subspace and ts classification scheme. We will discuss the connection of these models with pressing problems in condensed matter physics and quantum computation.
URL:https://www.ift.uam-csic.es/event/qijc-higher-abelian-quantum-double-models-introduction-to-the-characterization-and-classification-of-the-ground-state-subspace/
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:20250918T120000
DTEND;TZID=Europe/Madrid:20250918T130000
DTSTAMP:20260722T174440
CREATED:20250915T100643Z
LAST-MODIFIED:20251125T081259Z
UID:22596-1758196800-1758200400@www.ift.uam-csic.es
SUMMARY:Dualities and scale-separated AdS3 vacua
DESCRIPTION:Speaker: George Tringas\n\n\nInstitution: Lehigh U.\n\n\nLocation&Place: Red Room\n\n\nAbstract:\n\n\nAfter the usual paper discussion\, our guest George Tringas (Lehigh U.) will give a talk on Dualities and scale-separated AdS3 vacua
URL:https://www.ift.uam-csic.es/event/dualities-and-scale-separated-ads3-vacua/
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:20250909T113000
DTEND;TZID=Europe/Madrid:20250909T133000
DTSTAMP:20260722T174440
CREATED:20250915T092849Z
LAST-MODIFIED:20251125T081259Z
UID:22578-1757417400-1757424600@www.ift.uam-csic.es
SUMMARY:Holographic thermal entropy and modular conjugation from geodesic bit threads
DESCRIPTION:Speaker: Francesco Gentile\n\n\n\nInstitution: SISSA\n\n\n\n\n\n\n\n\nLocation&Place: Grey Room 2\n\n\n\nAbstract:\n\n\nIn this talk\, I will discuss some new interesting properties of geodesic bit threads in static backgrounds.\nBit threads are an insightful tool for investigating holographic entanglement entropy\, providing a reformulation of the Ryu-Takayanagi formula in terms of the maximal flux of a bounded and divergenceless vector field.\nAn explicit realization of bit threads is given by geodesic bit threads.\nI will first argue that\, for a spherical region on AdS boundary and for an interval on the BTZ boundary\, geodesic bit threads display a surprising connection with modular conjugation in CFT.\nThen\, I will show that for an interval on the BTZ boundary and for a spherical region on the boundary of Schwarzschild AdS\, the flux of geodesic bit threads hitting the event horizon provides the holographic thermal entropy\, i.e. the product of a thermal entropy density with the volume of the spherical region.
URL:https://www.ift.uam-csic.es/event/holographic-thermal-entropy-and-modular-conjugation-from-geodesic-bit-threads/
LOCATION:Madrid
CATEGORIES:Journal clubs,Scientific activities
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