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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:20240331T010000
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DTSTART:20241027T010000
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DTSTART:20250330T010000
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DTSTART:20251026T010000
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DTSTART:20260329T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251021T150000
DTEND;TZID=Europe/Madrid:20251021T160000
DTSTAMP:20260722T161942
CREATED:20251020T062512Z
LAST-MODIFIED:20251125T081104Z
UID:23383-1761058800-1761062400@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: Coherently enhanced decoherence and cloud substructure of atom interferometers
DESCRIPTION:Speaker: Pablo Blanco Mas (IFT)\n\n\n\n\n\n\n\n\nVenue & Time: Grey Room 3 / 15:00\n\nAbstract: We study how coherent scattering of a background gas off an atom (or other matter) interferometer can lead to enhanced signals from phase shifts and contrast loss. We focus on the inclusion of realistic features of atom interferometers such as finite temperature\, cloud substructure\, and time-dependent cloud radii. The inclusion of these effects\, extending beyond the previously considered point-like cloud approximation\, naturally allow us to study the smooth transition between the coherent and incoherent scattering regimes. We discuss how the formalism presented herein can be tested in the laboratory (with near-infrared photons or an eV-scale electron gun)\, and discuss an application for the detection of dark matter interacting via long-range forces.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-coherently-enhanced-decoherence-and-cloud-substructure-of-atom-interferometers/
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:20251021T140000
DTEND;TZID=Europe/Madrid:20251021T150000
DTSTAMP:20260722T161942
CREATED:20251020T062859Z
LAST-MODIFIED:20251125T081104Z
UID:23385-1761055200-1761058800@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-3/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251016T170000
DTEND;TZID=Europe/Madrid:20251016T180000
DTSTAMP:20260722T161942
CREATED:20251010T103553Z
LAST-MODIFIED:20251125T081257Z
UID:23294-1760634000-1760637600@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Renormalization and Effective Lagrangians'
DESCRIPTION:Pau Garcia Romeu (IFT) will present Renormalization and Effective Lagrangians by Joseph Polchinski.\n\nVenue&Time: Blue Room / 17:00\n\nAbstract:\n\nThere is a strong intuitive understanding of renormalization\, due to Wilson\, in terms of the scaling of effective lagrangians. We show that this can be made the basis for a proof of perturbative renormalization. We first study renormalizability in the language of renormalization group flows for a toy renormalization group equation. We then derive an exact renormalization group equation for a four-dimensional λø 4 theory with a momentum cutoff. We organize the cutoff dependence of the effective lagrangian into relevant and irrelevant parts\, and derive a linear equation for the irrelevant part. A lengthy but straightforward argument establishes that the piece identified as irrelevant actually is so in perturbation theory. This implies renormalizability. The method extends immediately to any system in which a momentum-space cutoff can be used\, but the principle is more general and should apply for any physical cutoff. Neither Weinberg’s theorem nor arguments based on the topology of graphs are needed.\n\nMore info: https://inspirehep.net/literature/189574
URL:https://www.ift.uam-csic.es/event/old-journal-club-renormalization-and-effective-lagrangians/
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/2025/10/OJC_Pau.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251016T120000
DTEND;TZID=Europe/Madrid:20251016T130000
DTSTAMP:20260722T161942
CREATED:20251009T103032Z
LAST-MODIFIED:20251125T081258Z
UID:23288-1760616000-1760619600@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Probing the Rigidity of String Theory'
DESCRIPTION:Speaker: Georgina Staudt (Max Planck Institute Munich) \n\nVenue&Time: Red Room / 12:00 \n\nAbstract: We investigate the deformability of the Veneziano amplitude. If string theory is the unique theory of quantum gravity\, the tree level amplitudes of weak coupling limits should be non-deformable. We make progress in this direction for tachyon-free superstring theories by deriving a general positivity bound and excluding some specific families of deformations.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-probing-the-rigidity-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:20251016T110000
DTEND;TZID=Europe/Madrid:20251016T120000
DTSTAMP:20260722T161942
CREATED:20251013T085555Z
LAST-MODIFIED:20251125T081258Z
UID:23315-1760612400-1760616000@www.ift.uam-csic.es
SUMMARY:Machine Learning and AI Journal Club
DESCRIPTION:Venue&Time: Grey Room 1
URL:https://www.ift.uam-csic.es/event/machine-learning-and-ai-journal-club/
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:20251014T140000
DTEND;TZID=Europe/Madrid:20251014T150000
DTSTAMP:20260722T161942
CREATED:20251008T110737Z
LAST-MODIFIED:20251125T081258Z
UID:23278-1760450400-1760454000@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-2/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251014T113000
DTEND;TZID=Europe/Madrid:20251014T130000
DTSTAMP:20260722T161942
CREATED:20251008T090655Z
LAST-MODIFIED:20251125T081258Z
UID:23262-1760441400-1760446800@www.ift.uam-csic.es
SUMMARY:Holo Club: Explicit Connections Between Krylov and Nielsen Complexity
DESCRIPTION:Speaker: Le-Chen Qu (IFT) \n\nVenue&Time: Grey Room 3 / 11:30 \n\nAbstract: We establish a precise correspondence between Krylov complexity and Nielsen complexity in quantum many-body systems. By identifying the Krylov basis with the generators of elementary gates in Nielsen’s geometric framework\, the Krylov complexity of precursor operators acquires a geometric interpretation as the length of straight-line paths in Nielsen geometry. This construction provides an upper bound on Nielsen complexity\, which becomes exact in the small-precursor limit. Employing the SYK model as a test case\, we demonstrate that the straight-line trajectory satisfies the Nielsen geodesic equation and remains both locally and globally minimizing up to a critical value of $z$\, beyond which conjugate points and geodesic loops arise. Within this framework\, cost functions quadratic in the Krylov index are further shown to reproduce the conjectured proportionality between the complexity growth rate and the operator size.
URL:https://www.ift.uam-csic.es/event/holo-club-explicit-connections-between-krylov-and-nielsen-complexity/
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:20251009T120000
DTEND;TZID=Europe/Madrid:20251009T130000
DTSTAMP:20260722T161942
CREATED:20251003T130507Z
LAST-MODIFIED:20251125T081258Z
UID:23246-1760011200-1760014800@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: Symmetric Moduli Spaces\, the Swampland Distance Conjecture (...and the Emergent String Conjecture?)
DESCRIPTION:Speaker: Bernardo Fraiman (IFT)\n\n\nVenue&Time: Red Room / 12:00\n\n\nAbstract: For non-compact\, locally symmetric moduli spaces M\, the set of geodesics and the geometry of the boundary can be completely characterised using group theory. Under the assumption that M is “compactifiable” and some mild conditions on the spectrum of states\, we prove the SDC for all locally symmetric spaces. We show that the states necessarily transform in some representation of the local isometry group\, and that the convex hull encoding the exponential rate at which the leading tower of states becomes light coincides with the convex hull of the weights of the representation.\n\nIn this talk I will discuss briefly some aspects of the proof\, the domain of applicability of our assumptions and their limitations. If time permits\, I will also explain how the relation between towers and weights allows one to classify moduli spaces\, particle state representations and space time dimensions compatible with the Emergent String Conjecture. Based on 2508.18401 and work in progress.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-symmetric-moduli-spaces-the-swampland-distance-conjecture-and-the-emergent-string-conjecture/
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:20251007T140000
DTEND;TZID=Europe/Madrid:20251007T150000
DTSTAMP:20260722T161942
CREATED:20251008T110638Z
LAST-MODIFIED:20251125T081259Z
UID:23275-1759845600-1759849200@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/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251002T120000
DTEND;TZID=Europe/Madrid:20251002T130000
DTSTAMP:20260722T161942
CREATED:20250928T204751Z
LAST-MODIFIED:20251125T081259Z
UID:23072-1759406400-1759410000@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Landau-Ginzburg Models and Flux Vacua'
DESCRIPTION:Speaker: Muthusamy Rajaguru (IFT Madrid)\n\n\n\n\nVenue&Time: Red Room / 12:00 PM\n\n\n\nAbstract: In this talk\, I will give an overview of recent progress that has been made in constructing non-geometric flux vacua. In particular\, I will focus on type IIB string compactifications where the internal geometry is described by the 2^6 and 1^9 Landau-Ginzburg (LG) models. These LG models have no Kähler moduli and allow us to realize GKP-type vacua explicitly in the interior of the complex structure moduli space.  I will summarize the properties of these vacua and their implications for certain Swampland conjectures.\n\nRelevant literature – 2503.16599\, 2407.16756\, 2407.16758\, 2406.03435\, 2306.15714\, 2203.15818
URL:https://www.ift.uam-csic.es/event/sps-journal-club-landau-ginzburg-models-and-flux-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:20250925T120000
DTEND;TZID=Europe/Madrid:20250925T130000
DTSTAMP:20260722T161942
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20250924T113000
DTEND;TZID=Europe/Madrid:20250924T123000
DTSTAMP:20260722T161942
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:20260722T161942
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:20260722T161942
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/
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
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