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CMSA Quantum Matter in Mathematics and Physics Seminar: Anomalies of Non-Invertible Symmetries

SEMINARS, CMSA EVENTS

September 13, 2023 4:30 pm

Speaker: Clay Córdova - University of Chicago

This seminar will be in person and virtual. Zoom: https://harvard.zoom.us/j/977347126 Password: cmsa For more information, please see: Quantum Matter in Mathematics and Physics (QMMP) 2023: https://cmsa.fas.harvard.edu/event_category/quantum-matter-seminar/ -------- Subscribe to Harvard CMSA...
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CMSA Topological Quantum Matter Seminar: Phase transitions out of quantum Hall states in moire TMD bilayers

SEMINARS, CMSA EVENTS

September 13, 2023 10:30 am

Speaker: Xueyang Song - MIT

Motivated by the recent experimental breakthroughs in observing Fractional Quantum Anomalous Hall (FQAH) states in moir\'e Transition Metal Dichalcogenide (TMD) bilayers, we propose and study various unconventional phase transitions between...
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CMSA Topological Quantum Matter Seminar: Homotopy classes of loops of Clifford unitaries

SEMINARS, CMSA EVENTS

September 12, 2023 4:00 pm

Speaker: Roman Geiko - UCLA

We study Clifford locality-preserving unitaries and stabilizer Hamiltonians by means of Hermitian K-theory. We demonstrate how the notion of algebraic homotopy of modules over Laurent polynomial rings translates into the...
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Harvard–MIT Algebraic Geometry Seminar: Enumerative geometry, wall-crossing and Virasoro constraints

SEMINARS, HARVARD-MIT ALGEBRAIC GEOMETRY

September 12, 2023 3:00 pm

Speaker: Miguel Moreira - MIT

Given a moduli space of either sheaves on a smooth projective variety or a moduli space of representations of a quiver, there are several invariants that we can extract. One...
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CMSA General Relativity Seminar: Pole skipping, quasinormal modes, shockwaves and their connection to chaos

CMSA GENERAL RELATIVITY SEMINAR, CMSA EVENTS

September 12, 2023 11:00 am

Speaker: Diandian Wang - Harvard University

A chaotic quantum system can be studied using the out-of-time-order correlator (OTOC). I will tell you about pole skipping — a recently discovered feature of the retarded Green’s function —...
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Special Colloquium: Quantitative homogenization, renormalization and anomalous diffusion

COLLOQUIUMS

September 11, 2023 3:00 pm

Speaker: Scott Armstrong - NYU Courant Institute

I will begin the talk with an overview of the topic of quantitative homogenization for elliptic and parabolic equations. Homogenization refers to the procedure of replacing a very "noisy" equation--...
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Richard P. Stanley Seminar in Combinatorics: The totally nonnegative tropical flag variety

SEMINARS, HARVARD-MIT COMBINATORICS

September 8, 2023 3:00 pm

Speaker: Jon Boretsky - Harvard University

The flag variety of rank r=(r_1,...,r_k) has points corresponding to collections of subspaces (V_1,..., V_k) with V_i of dimension r_i such that V_i is contained in V_{i+1}. It can be...
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CMSA Quantum Matter in Mathematics and Physics Seminar: A 6-year journey: from gravitational anomaly to a unified theory of generalized symmetry

SEMINARS, CMSA EVENTS

September 8, 2023 10:00 am

Speaker: Xiao-Gang Wen - MIT

Emergent symmetry can be generalized symmetry beyond (higher) group description and/or can be anomalous. I will describe a unified theory for generalized symmetry based on symmetry/topological-order correspondence. I will also...
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Special Colloquium – Systems of points with Coulomb interactions

COLLOQUIUMS

September 7, 2023 3:00 pm

Speaker: Sylvia Serfaty - NYU Courant Institute

Large ensembles of points with Coulomb interactions arise in various settings of condensed matter physics, classical and quantum mechanics, statistical mechanics, random matrices and even approximation theory, and they give...
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CMSA Probability Seminar: Correlation decay for finite lattice gauge theories

CMSA EVENTS

September 7, 2023 1:30 pm

Speaker: Arka Adhikari - Stanford University

In the setting of lattice gauge theories with finite (possibly non-Abelian) gauge groups at weak coupling, we prove exponential decay of correlations for a wide class of gauge invariant functions,...
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