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  • CMSA QMMP 05.05.23 (2)

    Detecting central charge in a superconducting quantum processor

    Hybrid - G10

    Quantum Matter Seminar Speaker: Sona Najafi (IBM Quantum) Title: Detecting central charge in a superconducting quantum processor Abstract: Physical systems at the continuous phase transition point exhibit conformal symmetry rendering local scaling invariance. In two dimensions, the conformal group possesses infinite generators described by Virasoro algebra with an essential parameter known as a central charge. While […]

  • Workshop on Global Categorical Symmetries

    CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

    The CMSA will be hosting a Workshop on Global Categorical Symmetries from May 7 - 12, 2023 Participation in the workshop is by invitation. Public Lectures There will be three lectures on Thursday, May 11, 2023, which are open to the public. Location:  Room G-10, CMSA, 20 Garden Street, Cambridge MA 02138 Note: The public […]

  • Modern Hopfield Networks for Novel Transformer Architectures

    Virtual

    https://youtu.be/5LXiQUsnHrI New Technologies in Mathematics Seminar Speaker: Dmitry Krotov, IBM Research - Cambridge Title: Modern Hopfield Networks for Novel Transformer Architectures Abstract: Modern Hopfield Networks or Dense Associative Memories are recurrent neural networks with fixed point attractor states that are described by an energy function. In contrast to conventional Hopfield Networks, which were popular in […]

  • Insights from single cell lineage trees

    Active Matter Seminar Speaker: Sahand Hormoz, Harvard Medical School, Dana-Farber Cancer Institute Title: Insights from single cell lineage trees Abstract: In this talk, I will discuss two recent projects from my lab that involve lineage trees of cells (the branching diagram that represents the ancestry and division history of individual cells). In the first project, we […]

  • CMSA Probability Seminar 05.11.23

    How do the eigenvalues of a large non-Hermitian random matrix behave?

    Harvard Science Center 1 Oxford Street, Cambridge, MA

    Probability Seminar Speaker: Giorgio Cipolloni (Princeton) Title: How do the eigenvalues of a large non-Hermitian random matrix behave? Abstract: We prove that the fluctuations of the eigenvalues converge to the Gaussian Free Field (GFF) on the unit disk. These fluctuations appear on a non-natural scale, due to strong correlations between the eigenvalues. Then, motivated by the […]

  • CMSA GR Seminar 05.11.23

    Positivity of Static quasi-local Mass in general relativity

    Virtual

    https://youtu.be/b4vyZvml0aw General Relativity Seminar Speaker: Aghil Alaee, Clark University Title: Positivity of Static quasi-local Mass in general relativity Abstract: In this talk, we review results on the PMT of quasi-local masses and prove the positivity of static quasi-local masses with respect to the AdS and AdS Schwarzschild spacetimes.

  • CMSA QMMP 05.12.23

    Anomalies of (1+1)D categorical symmetries

    Virtual

    Quantum Matter Seminar Speaker: Carolyn Zhang (U Chicago) Title: Anomalies of (1+1)D categorical symmetries Abstract: We present a general approach for detecting when a fusion category symmetry is anomalous, based on the existence of a special kind of Lagrangian algebra of the corresponding Drinfeld center. The Drinfeld center of a fusion category $A$ describes a […]

  • Quantum information and extended topological quantum field theory 

    CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

    Member Seminar Speaker: Gabriel Wong Title: Quantum information and extended topological quantum field theory Abstract: Recently, ideas from quantum information theory have played an important role in condensed matter and quantum gravity research. Most of these applications focus on the entanglement structure of quantum states, and the computation of entanglement measures such as entanglement entropy has […]

  • GRAMSIAcover-600x338

    GRAMSIA: Graphical Models, Statistical Inference, and Algorithms

    CMSA Room G10 CMSA, 20 Garden Street, Cambridge, MA, United States

    https://youtube.com/playlist?list=PL0NRmB0fnLJTwf06LwnkONwHGJ6gulZam On May 16 - May 19, 2023 the CMSA hosted a four-day workshop on GRAMSIA: Graphical Models, Statistical Inference, and Algorithms. The workshop was held in room G10 of the CMSA, located at 20 Garden Street, Cambridge, MA. This workshop was organized by David Gamarnik (MIT), Kavita Ramanan (Brown), and Prasad Tetali  (Carnegie Mellon). The […]

  • CMSA QMMP 06.09.23

    Classification of Self-Dual Vertex Operator Superalgebras of Central Charge at Most 24

    Virtual

    Quantum Matter Seminar Speakers: Gerald Höhn (Kansas State University) & Sven Möller (University of Hamburg) Title: Classification of Self-Dual Vertex Operator Superalgebras of Central Charge at Most 24 Abstract: We discuss the classfication of self-dual vertex operator superalgebras (SVOAs) of central charge 24, or in physics parlance the purely chiral 2-dimensional fermionic conformal field theories […]

  • CMSA QMMP 06.13.23

    Small Bosonic CFTs, Chiral Fermionization, and Symmetry/Subalgebra Duality

    Virtual

    Quantum Matter Seminar Speaker: Brandon C. Rayhaun (C. N. Yang ITP, Stony Brook University) Title: Small Bosonic CFTs, Chiral Fermionization, and Symmetry/Subalgebra Duality Abstract: Conformal field theories in (1+1)D are key actors in many dramas of physics and mathematics. Their classification has therefore been an important and long-standing problem. In this talk, I will explain […]

  • CMSA QMMP 06.26.23

    Chiral fermionic CFTs of central charge ≤ 16

    Virtual

    Quantum Matter Seminar Title: Chiral fermionic CFTs of central charge ≤ 16 Abstract: We classified all chiral fermionic CFTs of central charge ≤ 16 using Kac's theorem and bosonization/fermionization. This talk will discuss the derivation of this result, its application to the classification of non-supersymmetric heterotic string theories, and along the way we'll address some […]