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Symmetry Colloquia – Global Categorical Symmetries

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

Symmetry Colloquia - Global Categorical Symmetries May 2, 2024 Location: Room G-10, CMSA, 20 Garden Street, Cambridge MA 02138 Speaker: Thomas Dumitrescu, UCLA Title: Symmetries, Invertible Field Theories, and Gauge Theory Phases Abstract: I will start with a brief overview of gauge theory phases in 3+1 dimensions through the lens of higher symmetries — in particular the realization […]

Symmetry Colloquia – Global Categorical Symmetries

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

Symmetry Colloquia - Global Categorical Symmetries May 2, 2024 Location: Room G-10, CMSA, 20 Garden Street, Cambridge MA 02138 Speaker: Theo Johnson-Freyd, Dalhousie University and Perimeter Institute Title: The Universal Target Category Abstract: Hilbert's Nullstellensatz says that the complex numbers C satisfy a universal property among all R-algebras: every not-too-large nonzero commutative R-algebra maps to C. Deligne proved a similar statement […]

Mathematical Aspects of Scattering Amplitudes Lecture

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

Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Andrew McLeod, Edinburgh Title: Genealogical Constraints on Feynman Integrals

Event Series Colloquium

Liouville Theory and Weil-Petersson Geometry

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

Colloquium Speaker: Sarah Harrison (Northeastern University) Title: Liouville Theory and Weil-Petersson Geometry Abstract: Two-dimensional conformal field theory is a powerful tool to understand the geometry of surfaces. Liouville conformal field theory in the classical (large central charge) limit encodes the geometry of the moduli space of Riemann surfaces. I describe an efficient algorithm to compute […]

Event Series Member Seminar

On using ML for Economics

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

CMSA Member Seminar Speaker: Sergiy Verstyuk Title: On using ML for Economics Abstract: I will introduce some tools from the field of machine learning and discuss how they can be leveraged to get a fresh perspective on economics.

Event Series General Relativity Seminar

Real-time observables in horizon thermodynamics

Virtual

https://youtu.be/zxjuAlzuW78 General Relativity Seminar Speaker: Albert Law, Stanford Title: Real-time observables in horizon thermodynamics Abstract: Euclidean black hole 1-loop determinants have recently been shown to compute a renormalized thermal canonical partition function for free fields in Lorentzian signature. A key ingredient is a 'quasinormal mode (QNM) character', whose Fourier transform equals the renormalized spectral density of the […]

Mathematical Aspects of Scattering Amplitudes Lecture

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

Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Jacob Bourjaily, Penn State Title: The Algebraic and Transcendental Structure of Perturbative QFT

Event Series Algebraic Geometry in String Theory Seminar

Computing periods of hypersurfaces and elliptic surfaces via effective homology

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

Algebraic Geometry in String Theory Seminar Speaker: Eric Pichon-Pharabod, Universite Paris-Saclay Title: Computing periods of hypersurfaces and elliptic surfaces via effective homology Abstract: The period matrix of a smooth complex projective variety X encodes the isomorphism between its singular homology and its algebraic De Rham cohomology. Numerical approximations with sufficient precision of the entries of this […]

Event Series Quantum Matter in Mathematics and Physics Seminar

From quantum Hall to Hubbard physics in twisted bilayer graphene

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

Quantum Matter in Mathematics and Physics Seminar Speaker: Eslam Khalaf (Harvard) Title: From quantum Hall to Hubbard physics in twisted bilayer graphene Abstract: Early on it was noticed that twisted bilayer graphene (TBG) has elements in common with two paradigmatic examples of strongly correlated physics: Hubbard physics and quantum Hall physics. On the one hand, […]

Event Series Member Seminar

On the landscape of 4d N=2 SCFTs

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

CMSA Member Seminar Speaker: Robert Moscrop, Harvard CMSA Title: On the landscape of 4d N=2 SCFTs Abstract: Four-dimensional conformal field theories with sufficient (N = 2) supersymmetry are highly constrained. So much so, there has been an ongoing effort to classify them using only information about their moduli space of vacua. In this talk, I will review […]

Event Series General Relativity Seminar

An analogue of non-interacting quantum field theory in Riemannian signature

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

General Relativity Seminar Speaker: Mikhail Molodyk, Stanford Title: An analogue of non-interacting quantum field theory in Riemannian signature Abstract: Recent advances using microlocal tools have led to constructions, for wave operators on various classes of spacetimes, of four distinguished Fredholm inverses which have the singular behavior required of retarded, advanced, Feynman, and anti-Feynman propagators in QFT. Vasy […]