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DTSTART;TZID=America/New_York:20260203T161500
DTEND;TZID=America/New_York:20260203T180000
DTSTAMP:20260503T234833
CREATED:20251223T191910Z
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SUMMARY:More on Kubota's spectrum of invertible states
DESCRIPTION:Geometry and Quantum Theory Seminar \nSpeakers: Dan Freed and Bowen Yang\, Harvard CMSA \nTitle: More on Kubota’s spectrum of invertible states \nAbstract: Bowen will explain a construction aptly dubbed “Kitaev’s pump” in Kubota’s paper. Time permitting\, Bowen will demonstrate its ubiquity throughout the study of topological phases\, where it appears under various guises. In the second hour\, Dan will sketch Kubota’s construction of a spectrum from families of invertible quantum lattice systems.
URL:https://cmsa.fas.harvard.edu/event/quantumgeo_2326/
LOCATION:Science Center 507\, 1 Oxford Street\, Cambridge\, 02138
CATEGORIES:Geometry and Quantum Theory Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Geometry-Quantum-Theory-2.3.26-scaled.png
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20260217T161500
DTEND;TZID=America/New_York:20260217T180000
DTSTAMP:20260503T234833
CREATED:20251223T192010Z
LAST-MODIFIED:20260217T154218Z
UID:10003854-1771344900-1771351200@cmsa.fas.harvard.edu
SUMMARY:Geometric structures on gauge theoretic moduli spaces
DESCRIPTION:Geometry and Quantum Theory Seminar \nSpeaker: Saman Habibi Esfahani (CMSA) \nTitle: Geometric structures on gauge theoretic moduli spaces \nAbstract: Motivated by Witten’s study of instantons on S3 x S1\, we survey some classical and recent results\, programs\, and conjectures on geometric structures\, such as symplectic and hyperkahler\, on moduli spaces of instantons and monopoles on various manifolds\, from a mathematical perspective. This talk serves as background for Max’s talk on 2/24.
URL:https://cmsa.fas.harvard.edu/event/quantumgeo_21726/
LOCATION:Science Center 507\, 1 Oxford Street\, Cambridge\, 02138
CATEGORIES:Geometry and Quantum Theory Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Geometry-Quantum-Theory-2.17.26-scaled.png
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DTSTART;TZID=America/New_York:20260219T153000
DTEND;TZID=America/New_York:20260219T163000
DTSTAMP:20260503T234833
CREATED:20260209T003754Z
LAST-MODIFIED:20260209T193802Z
UID:10003891-1771515000-1771518600@cmsa.fas.harvard.edu
SUMMARY:Constructing oriented TQFTs from twisted pivotal tensor categories
DESCRIPTION:Geometry and Quantum Theory Seminar \nSpeaker: William Stewart \nTitle: Constructing oriented TQFTs from twisted pivotal tensor categories \nAbstract: The cobordism hypothesis classifies n-dimensional oriented TQFTs in terms of SO(n) homotopy fixed point data. An SO(2) homotopy fixed point structure on a finite tensor category gives rise to a twisted pivotal structure (a more general notion than a pivotal structure). In this talk\, I will illustrate how the usual skein theory (also called string nets) of a pivotal tensor category can be generalized to the twisted pivotal setting\, yielding new 2d oriented TQFTs. This is joint work with Ben Haioun and Filippos Sytilidis.
URL:https://cmsa.fas.harvard.edu/event/quantumgeo_21926/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Geometry and Quantum Theory Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Geometry-Quantum-Theory-2.19.26-scaled.png
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DTSTART;TZID=America/New_York:20260224T161500
DTEND;TZID=America/New_York:20260224T180000
DTSTAMP:20260503T234833
CREATED:20251223T192031Z
LAST-MODIFIED:20260223T151346Z
UID:10003855-1771949700-1771956000@cmsa.fas.harvard.edu
SUMMARY:Bi-HKT Manifolds\, Sigma Models\, Large N=4 and their String Constructions
DESCRIPTION:Geometry and Quantum Theory Seminar \nSpeakers: Max Hübner\, CMSA \nTitle: Bi-HKT Manifolds\, Sigma Models\, Large N=4 and their String Constructions \nAbstract: We continue our review of Witten’s paper “Instantons and the Large N=4 Algebra”. We discuss the realization of large N=4 supersymmetry in the context of supersymmetric sigma-models\, and discuss and motivate string theoretic duals to these sigma models. This talk aims to supply physical insight building on Saman’s talk from last week 2/17.
URL:https://cmsa.fas.harvard.edu/event/quantumgeo_22426/
LOCATION:Science Center 507\, 1 Oxford Street\, Cambridge\, 02138
CATEGORIES:Geometry and Quantum Theory Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Geometry-Quantum-Theory-2.24.26.png
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