BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Matthias Gaberdiel (ETH Zurich) DTSTART:20210317T080000Z DTEND:20210317T090000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/1 DESCRIPTION:Title: An exact AdS/CFT duality\nby Matthias Gaberd iel (ETH Zurich) as part of BIMSA Geometry and Physics Seminar\n\nAbstract : TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/1/ END:VEVENT BEGIN:VEVENT SUMMARY:David Simmons-Duffin (Caltech) DTSTART:20210322T070000Z DTEND:20210322T080000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/2 DESCRIPTION:Title: Sharp Boundaries for the Swampland\nby David Simmons-Duffin (Caltech) as part of BIMSA Geometry and Physics Seminar\n\ nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/2/ END:VEVENT BEGIN:VEVENT SUMMARY:Jim Halverson (Northeastern University) DTSTART:20210512T020000Z DTEND:20210512T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/4 DESCRIPTION:Title: Complexity\, Physics\, and Effective Theories of Deep Learning 1 (canceled)\nby Jim Halverson (Northeastern University ) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/4/ END:VEVENT BEGIN:VEVENT SUMMARY:Jim Halverson (Northeastern University) DTSTART:20210517T020000Z DTEND:20210517T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/5 DESCRIPTION:Title: Complexity\, Physics\, and Effective Theories of Deep Learning 1\nby Jim Halverson (Northeastern University) as part o f BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Jim Halverson (Northeastern University) DTSTART:20210519T020000Z DTEND:20210519T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/6 DESCRIPTION:Title: Complexity\, Physics\, and Effective Theories of Deep Learning 2\nby Jim Halverson (Northeastern University) as part o f BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Wolfgang Lerche (CERN) DTSTART:20210414T080000Z DTEND:20210414T090000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/7 DESCRIPTION:Title: Fluxes\, Holomorphic Anomalies and Elliptic Gene ra in d=4\nby Wolfgang Lerche (CERN) as part of BIMSA Geometry and Phy sics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Zhenbin Yang (Stanford University) DTSTART:20210526T020000Z DTEND:20210526T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/8 DESCRIPTION:Title: Wormholes and Unitarity of Black Hole Evolution Process\nby Zhenbin Yang (Stanford University) as part of BIMSA Geomet ry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Shouvik Datta (CERN) DTSTART:20210510T080000Z DTEND:20210510T090000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/9 DESCRIPTION:Title: Ensemble averaging and AdS3/CFT2\nby Shouvik Datta (CERN) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: T BA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/9/ END:VEVENT BEGIN:VEVENT SUMMARY:Andrew Strominger (Harvard University) DTSTART:20210510T020000Z DTEND:20210510T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/10 DESCRIPTION:Title: Progress on Flat Holography\nby Andrew Stro minger (Harvard University) as part of BIMSA Geometry and Physics Seminar\ n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/10/ END:VEVENT BEGIN:VEVENT SUMMARY:Pawel Caputa (University of Warsaw) DTSTART:20210602T080000Z DTEND:20210602T090000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/11 DESCRIPTION:Title: Holographic Path Integral Optimization\nby Pawel Caputa (University of Warsaw) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/11/ END:VEVENT BEGIN:VEVENT SUMMARY:Eva Silverstein (Stanford University) DTSTART:20210616T020000Z DTEND:20210616T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/12 DESCRIPTION:Title: Hyperbolic compactification of M theory and de Sitter quantum gravity\nby Eva Silverstein (Stanford University) as pa rt of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/12/ END:VEVENT BEGIN:VEVENT SUMMARY:Jim Halverson (Northeastern University) DTSTART:20210524T020000Z DTEND:20210524T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/13 DESCRIPTION:Title: Complexity\, Physics\, and Effective Theories o f Deep Learning 3\nby Jim Halverson (Northeastern University) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/13/ END:VEVENT BEGIN:VEVENT SUMMARY:Djordje Radicevic (Brandeis University) DTSTART:20210609T020000Z DTEND:20210609T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/14 DESCRIPTION:Title: An Introduction to the Lattice-Continuum Corres pondence\nby Djordje Radicevic (Brandeis University) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/14/ END:VEVENT BEGIN:VEVENT SUMMARY:Ken Kikuchi (YMSC) DTSTART:20210928T030000Z DTEND:20210928T040000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/15 DESCRIPTION:Title: Symmetry enhancement in RCFT\nby Ken Kikuch i (YMSC) as part of BIMSA Geometry and Physics Seminar\n\nLecture held in BIMSA\, 1120.\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/15/ END:VEVENT BEGIN:VEVENT SUMMARY:Xi Yin (Harvard University) DTSTART:20211102T123000Z DTEND:20211102T133000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/16 DESCRIPTION:Title: Uses of String Field Theory\nby Xi Yin (Har vard University) as part of BIMSA Geometry and Physics Seminar\n\nAbstract : TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/16/ END:VEVENT BEGIN:VEVENT SUMMARY:Eliot Hijano (Princeton University) DTSTART:20211026T000000Z DTEND:20211026T010000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/17 DESCRIPTION:Title: Flat holography as a flat limit of AdS/CFT\ nby Eliot Hijano (Princeton University) as part of BIMSA Geometry and Phys ics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/17/ END:VEVENT BEGIN:VEVENT SUMMARY:Satoshi Yamaguchi (Osaka University) DTSTART:20211116T030000Z DTEND:20211116T040000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/18 DESCRIPTION:Title: Non-invertible topological defects in 4-dimensi onal $Z_2$ pure lattice gauge theory\nby Satoshi Yamaguchi (Osaka Univ ersity) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/18/ END:VEVENT BEGIN:VEVENT SUMMARY:Xinan Zhou (KITS\, University of Chinese Academy of Sciences) DTSTART:20211109T030000Z DTEND:20211109T040000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/19 DESCRIPTION:Title: Gluon Scattering in AdS\nby Xinan Zhou (KIT S\, University of Chinese Academy of Sciences) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/19/ END:VEVENT BEGIN:VEVENT SUMMARY:Hongliang Jiang (Queen Mary University of London) DTSTART:20211123T080000Z DTEND:20211123T090000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/20 DESCRIPTION:Title: Celestial OPEs: from string worldsheet to infin ite Ward identities\nby Hongliang Jiang (Queen Mary University of Lond on) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/20/ END:VEVENT BEGIN:VEVENT SUMMARY:Haoyu Sun (University of Texas at Austin) DTSTART:20211228T030000Z DTEND:20211228T040000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/21 DESCRIPTION:Title: (CANCELLED)\nby Haoyu Sun (University of Te xas at Austin) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/21/ END:VEVENT BEGIN:VEVENT SUMMARY:Min-xin Huang (University of Science and Technology of China) DTSTART:20211214T030000Z DTEND:20211214T040000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/22 DESCRIPTION:Title: Bootstrapping Calabi-Yau Quantum Mechanics\ nby Min-xin Huang (University of Science and Technology of China) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/22/ END:VEVENT BEGIN:VEVENT SUMMARY:Jarah Evslin (Institute of Modern Physics) DTSTART:20220224T083000Z DTEND:20220224T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/23 DESCRIPTION:Title: An Introduction to Schrodinger Wave Functionals \nby Jarah Evslin (Institute of Modern Physics) as part of BIMSA Geome try and Physics Seminar\n\n\nAbstract\nEach configuration in a quantum fie ld theory corresponds to a map from a space X of functions or bundles with sections to the space of complex numbers. These maps are called Schroding er wave functionals. They generalize wave functions in quantum mechanics\, which are maps from a finite-dimensional manifold to the complex numbers. We review the main properties of wave functions and wave functionals in a series of examples. We describe an embedding of X into this quantum confi guration space and argue that perturbative quantum field theory only probe s a tubular neighborhood of its image\, but that the poorly understood glo bal properties of the quantum configuration space are relevant to the conf inement problem in supersymmetric QCD.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/23/ END:VEVENT BEGIN:VEVENT SUMMARY:Bartlomiej Czech (Institute for Advanced Study) DTSTART:20220303T083000Z DTEND:20220303T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/24 DESCRIPTION:Title: Holographic Cone of Average Entropies and Unive rsality of Black Holes\nby Bartlomiej Czech (Institute for Advanced St udy) as part of BIMSA Geometry and Physics Seminar\n\n\nAbstract\nThe holo graphic entropy cone\, which identifies von Neumann entropies of CFT regio ns that are consistent with a semiclassical bulk dual\, is currently known only up to n=5 regions. I explain that average entropies of p-partite sub systems can be checked for consistency with a semiclassical bulk dual far more easily\, for an arbitrary number of regions n. This analysis defines the "Holographic Cone of Average Entropies" (HCAE). I conjecture the exact form of HCAE\, and find that it has the following properties: (1) HCAE is the simplest it could be\, namely it is a simplicial cone. (2) Its extrem al rays represent stages of thermalization (black hole formation). (3) In a time-reversed picture\, the extremal rays of HCAE represent stages of un itary black hole evaporation\, as stipulated by the island solution of the black hole information paradox. (4) HCAE is bound by a novel\, infinite f amily of holographic entropy inequalities. (5) HCAE is the simplest it cou ld be also in its dependence on the number of regions n\, namely its bound ing inequalities are n-independent. (6) In a precise sense I describe\, th e bounding inequalities of HCAE unify (almost) all previously discovered h olographic inequalities and strongly constrain future inequalities yet to be discovered. I also sketch an interpretation of HCAE in terms of error c orrection and the holographic Renormalization Group. The big lesson that H CAE seems to be teaching us is about the universality of black hole physic s.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/24/ END:VEVENT BEGIN:VEVENT SUMMARY:Eoin Ó Colgáin (CQUeST) DTSTART:20220317T020000Z DTEND:20220317T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/25 DESCRIPTION:Title: Is Hubble constant a constant?\nby Eoin Ó Colgáin (CQUeST) as part of BIMSA Geometry and Physics Seminar\n\n\nAbstr act\nModern cosmology rests upon the Cosmological Principle or FLRW paradi gm\, namely the assumption that the Universe is isotropic and homogeneous at large scales. Working within these assumptions\, we are witnessing a po tential 5 sigma discrepancy in the Hubble constant H0 between early and late Universe determinations. I will explain how this discrepancy may be a n artifact of a breakdown of FLRW at large scales. If true\, we're lookin g at paradigm shift in cosmology.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/25/ END:VEVENT BEGIN:VEVENT SUMMARY:Nicolai Reshetikhin (YMSC) DTSTART:20220407T083000Z DTEND:20220407T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/26 DESCRIPTION:Title: Superintegrable systems-I\nby Nicolai Reshe tikhin (YMSC) as part of BIMSA Geometry and Physics Seminar\n\n\nAbstract\ nFirst part of the talk is introduction to Hamiltonian integrability. In t he second part of the talk their quantum counterparts will be introduced w ith some examples. Important class of examples is related to moduli spaces of connections over surfaces.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/26/ END:VEVENT BEGIN:VEVENT SUMMARY:Nicolai Reshetikhin (YMSC) DTSTART:20220414T083000Z DTEND:20220414T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/27 DESCRIPTION:Title: Superintegrable systems-II\nby Nicolai Resh etikhin (YMSC) as part of BIMSA Geometry and Physics Seminar\n\n\nAbstract \nFirst part of the talk is introduction to Hamiltonian integrability. In the second part of the talk their quantum counterparts will be introduced with some examples. Important class of examples is related to moduli space s of connections over surfaces.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/27/ END:VEVENT BEGIN:VEVENT SUMMARY:Nicolai Reshetikhin (YMSC) DTSTART:20220421T083000Z DTEND:20220421T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/28 DESCRIPTION:Title: Superintegrable systems-III\nby Nicolai Res hetikhin (YMSC) as part of BIMSA Geometry and Physics Seminar\n\n\nAbstrac t\nThe talk will star with an overview of quatntum superintegrability of t he spin Calogero-Moser model. Then n-spin CM models will be introduced and it will shown how they are related to two-dimensional Yang-Mills theory.\ n\nZoom ID: 361 038 6975 \npassword: BIMSA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/28/ END:VEVENT BEGIN:VEVENT SUMMARY:Zohar Komargodski (SCGP) DTSTART:20220505T020000Z DTEND:20220505T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/29 DESCRIPTION:Title: Comments on Wilson Lines in Massless Gauge Theo ries\nby Zohar Komargodski (SCGP) as part of BIMSA Geometry and Physic s Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/29/ END:VEVENT BEGIN:VEVENT SUMMARY:Sergei Gukov (Caltech) DTSTART:20220526T020000Z DTEND:20220526T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/30 DESCRIPTION:Title: Interesting invariants and TQFTs from 3d-3d cor respondence\nby Sergei Gukov (Caltech) as part of BIMSA Geometry and Physics Seminar\n\n\nAbstract\nWe review recent progress in 3d-3d correspo ndence\, with a focus on new topological invariants and on interesting top ological quantum field theories (TQFTs). In particular\, we discuss how th is line of development can help to bridge topology and quantum topology.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/30/ END:VEVENT BEGIN:VEVENT SUMMARY:Yuji Tachikawa (IPMU) DTSTART:20220428T020000Z DTEND:20220428T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/31 DESCRIPTION:Title: On the absence of global anomalies of heterotic string theories\nby Yuji Tachikawa (IPMU) as part of BIMSA Geometry a nd Physics Seminar\n\n\nAbstract\nSuperstring theory as we know it started from the discovery by Green and Schwarz in 1984 that the perturbative ano malies of heterotic strings miraculously cancel. But the cancellation of g lobal anomalies of heterotic strings remained an open problem for a long t ime. \nIn this talk\, I would like to report how this issue was finally re solved last year\, by combining two developments outside of string theory. Namely\, on one hand\, the study of topological phases in condensed matte r theory has led to our vastly improved understanding of the general form of global anomalies. On the other hand\, the study of topological modular forms in algebraic topology allows us to constrain the data of heterotic w orldsheet theories greatly\, as far as their contributions to the anomalie s are concerned. Putting them together\, it is possible to show that globa l anomalies of heterotic strings are always absent.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/31/ END:VEVENT BEGIN:VEVENT SUMMARY:Eric Sharpe (Virginia tech.) DTSTART:20220519T020000Z DTEND:20220519T033000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/32 DESCRIPTION:Title: An introduction to decomposition\nby Eric S harpe (Virginia tech.) as part of BIMSA Geometry and Physics Seminar\n\n\n Abstract\nIn this talk I will review work on `decomposition\,' a property of 2d theories with 1-form symmetries and\, more generally\, d-dim'l theor ies with (d-1)-form symmetries. Decomposition is the observation that suc h quantum field theories are equivalent to ('decompose into’) disjoint unions of other QFTs\, known in this context as "universes.” Examples i nclude two-dimensional gauge theories and\norbifolds with matter invariant under a subgroup of the gauge group. Decomposition explains and relates s everal physical properties of these theories -- for example\, restriction s on allowed instantons arise as a "multiverse interference effect" betwee n contributions from constituent universes. First worked out in 2006 as part of efforts to understand string propagation on stacks\, decompositio n has been the driver of a number of developments since. I will walk throu gh general aspects of 2d gauge theories that exhibit decomposition\, dive into specifics in orbifold examples\, and as time permits\, discuss recent work in progress.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/32/ END:VEVENT BEGIN:VEVENT SUMMARY:Kostas Skenderis (University of Southampton) DTSTART:20220609T083000Z DTEND:20220609T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/33 DESCRIPTION:by Kostas Skenderis (University of Southampton) as part of BIM SA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/33/ END:VEVENT BEGIN:VEVENT SUMMARY:Wei Song (Tsinghua University) DTSTART:20220616T083000Z DTEND:20220616T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/34 DESCRIPTION:by Wei Song (Tsinghua University) as part of BIMSA Geometry an d Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/34/ END:VEVENT BEGIN:VEVENT SUMMARY:Marcos Marino (Universite de Geneve) DTSTART:20220602T083000Z DTEND:20220602T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/35 DESCRIPTION:Title: Resurgence and quantum topology\nby Marcos Marino (Universite de Geneve) as part of BIMSA Geometry and Physics Semina r\n\n\nAbstract\nQuantum field theories and string theories often lead to perturbative series which encode geometric information. In this lecture I will argue that\, in the case of complex Chern-Simons theory\, perturbat ive series secretly encode integer invariants\, related in some cases to B PS counting. The framework which makes this relation possible is the theor y of resurgence\, where perturbative series lead to additional non-perturb ative sectors\, and the integer invariants arise as Stokes constants. I wi ll illustrate these claims with explicit examples related to quantum invar iants of hyperbolic knots. If time permits\, I will mention similar result s in topological string theory.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/35/ END:VEVENT BEGIN:VEVENT SUMMARY:Cumrun Vafa (Harvard University) DTSTART:20220623T010000Z DTEND:20220623T020000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/36 DESCRIPTION:Title: Geometric Obstruction to Scale Separation\n by Cumrun Vafa (Harvard University) as part of BIMSA Geometry and Physics Seminar\n\n\nAbstract\nIn this talk I review the obstructions to scale sep aration for quantum gravitational backgrounds involving AdS space. This b asically means that the overall aspects of the internal geometry are deepl y linked with the curvature of the macroscopic AdS space it gives rise to. These obstructions include evidence of a no-go conjecture in the context of Einstein manifolds which puts a lower bound on its diameter\, as well as explaining geometric issues arising in the KKLT scenario which prevents it from giving rise to a counter-example.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/36/ END:VEVENT BEGIN:VEVENT SUMMARY:Nathan Seiberg (IAS) DTSTART:20220728T020000Z DTEND:20220728T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/37 DESCRIPTION:by Nathan Seiberg (IAS) as part of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/37/ END:VEVENT BEGIN:VEVENT SUMMARY:Iosif Bena (IPhT\, Saclay) DTSTART:20220707T083000Z DTEND:20220707T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/39 DESCRIPTION:Title: The Tadpole Problem\nby Iosif Bena (IPhT\, Saclay) as part of BIMSA Geometry and Physics Seminar\n\n\nAbstract\nThe f luxes that stabilize the complex-structure moduli of string compactificati ons give rise to a nontrivial D3 charge\, which needs to be canceled by ot her objects in the compactification. I will present arguments that this is impossible when the number of complex-structure moduli is large. This ind icates that all String-Theory compactifications on manifolds with a large number of complex-structure moduli have massless scalars and hence are not suited for phenomenology.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/39/ END:VEVENT BEGIN:VEVENT SUMMARY:M. M. Sheikh-Jabbari (IPM) DTSTART:20220630T083000Z DTEND:20220630T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/40 DESCRIPTION:Title: Gravity $\\leftrightharpoons$ Thermodynamics< /a>\nby M. M. Sheikh-Jabbari (IPM) as part of BIMSA Geometry and Physics S eminar\n\n\nAbstract\nLast 50 years' developments have revealed deep relat ions between thermodynamics and gravity as formulated in Einstein general relativity\, despite their apparent differences. These relations seem so fundamental and deep that they have prompted the idea that they may be te lling us about the very nature of gravity. In this talk I review these sal ient features and discuss recent developments in the connection between gr avity and thermodynamics. In particular\, I describe how general covarianc e ingravity theories leads to laws of thermodynamics when we consider grav ity on spacetimes with null boundaries.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/40/ END:VEVENT BEGIN:VEVENT SUMMARY:Thomas Hartman (Cornell University) DTSTART:20220825T020000Z DTEND:20220825T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/41 DESCRIPTION:Title: 3D gravity as an average large-c CFT\nby Th omas Hartman (Cornell University) as part of BIMSA Geometry and Physics Se minar\n\n\nAbstract\nEuclidean wormholes have played an important role in recent progress on 2D gravity and on black hole information in higher dime nsions. However\, these spacetimes can also lead to puzzling results that seem to disagree with quantum mechanics and the AdS/CFT correspondence\, w hich has led to the suggestion that wormholes arise from coarse-graining o ver UV degrees of freedom. I will explain the puzzle and show that Euclide an wormholes and other higher topology spacetimes in 3D gravity can be int erpreted as averaged solutions of the 2D conformal bootstrap equations.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/41/ END:VEVENT BEGIN:VEVENT SUMMARY:Jan Manschot (Trinity College Dublin) DTSTART:20221020T020000Z DTEND:20221020T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/42 DESCRIPTION:Title: Topological correlators of 4d N=2* and 5d N=1 s uper Yang-Mills\nby Jan Manschot (Trinity College Dublin) as part of B IMSA Geometry and Physics Seminar\n\n\nAbstract\nI will discuss the evalua tion of correlation functions for topologically twisted gauge theory\, spe cifically 1) the mass deformation of the 4d N=4 supersymmetric theory\, an d 2) the 5d N=1 supersymmetric theory compactified on a four-manifold time s S^1. For gauge group SU(2)\, the correlation functions reduce in the low energy effective field theory to an integral over a fundamental domain in the upper-half plane. Correlation functions of the two theories give rise to topological invariants of the four-manifold\, including Donaldson inva riants and (holomorphic) Euler characteristics.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/42/ END:VEVENT BEGIN:VEVENT SUMMARY:Clay Córdova (University of Chicago) DTSTART:20221027T020000Z DTEND:20221027T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/43 DESCRIPTION:Title: Non-Invertible Chiral Symmetry and Exponential Hierarchies\nby Clay Córdova (University of Chicago) as part of BIMSA Geometry and Physics Seminar\n\n\nAbstract\nWe elucidate the fate of clas sical symmetries which suffer from abelian Adler-Bell-Jackiw anomalies. In stead of being completely destroyed\, these symmetries survive as non-inve rtible topological global symmetry defects with worldvolume anyon degrees of freedom that couple to the bulk through a magnetic one-form global symm etry as in the fractional hall effect. These non-invertible chiral symmetr ies imply selection rules on correlation functions and arise in familiar m odels of massless quantum electrodynamics and models of axions (as well as their non-abelian generalizations). When the associated bulk magnetic one -form symmetry is broken by the propagation of dynamical magnetic monopole s\, the selection rules of the non-invertible chiral symmetry defects are violated non-perturbatively. This leads to technically natural exponential hierarchies in axion potentials and fermion masses.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/43/ END:VEVENT BEGIN:VEVENT SUMMARY:Barak Gabai (Harvard University) DTSTART:20221208T020000Z DTEND:20221208T030000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/45 DESCRIPTION:Title: Line Operators in Chern-Simons-Matter Theories and Bosonization in Three Dimensions\nby Barak Gabai (Harvard Universi ty) as part of BIMSA Geometry and Physics Seminar\n\n\nAbstract\nI'll cove r our recent publications where we study Chern-Simons theories at large N with either bosonic or fermionic matter in the fundamental representation. The most fundamental operators in these theories are mesonic line operato rs\, the simplest example being Wilson lines ending on fundamentals. We cl assify the conformal line operators along an arbitrary smooth path as well as the spectrum of conformal dimensions and transverse spins of their bou ndary operators at finite 't Hooft coupling. These line operators are show n to satisfy first-order chiral evolution equations\, in which a smooth va riation of the path is given by a factorized product of two line operators . We argue that this equation together with the spectrum of boundary opera tors are sufficient to uniquely determine the expectation values of these operators. We demonstrate this by bootstrapping the two-point function of the displacement operator on a straight line. We show that the line operat ors in the theory of bosons and the theory of fermions satisfy the same ev olution equation and have the same spectrum of boundary operators.\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/45/ END:VEVENT BEGIN:VEVENT SUMMARY:Andres Collinucci (Brussels U.\, PTM) DTSTART:20221215T083000Z DTEND:20221215T093000Z DTSTAMP:20260404T110957Z UID:BIMSA_geometry_and_physics/46 DESCRIPTION:Title: Flops of any length\, Gopakumar-Vafa invariants and 5d Higgs Branches\nby Andres Collinucci (Brussels U.\, PTM) as pa rt of BIMSA Geometry and Physics Seminar\n\nAbstract: TBA\n LOCATION:https://stable.researchseminars.org/talk/BIMSA_geometry_and_physi cs/46/ END:VEVENT END:VCALENDAR