Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Daniil Rudenko, U Chicago Title: Introduction to Cluster Polylogarithms Location: Harvard Science Center 310
Active Matter Seminar Speaker: Jayson Paulose, University of Oregon Title: Control of parametric amplification in space-time modulated mechanical metamaterials Abstract: Active mechanical metamaterials harbor acoustic signal processing functionalities that are impossible to achieve in passive structures. Amplifying an elastic wave as it passes through the material is a prominent example, with potential applications in acoustic signal […]
Symmetry Colloquia - Global Categorical Symmetries May 2, 2024 Location: Room G-10, CMSA, 20 Garden Street, Cambridge MA 02138 Speaker: Clay Còrdova, University of Chicago Title: Particle-Soliton Degeneracies from Spontaneously Broken Non-Invertible Symmetry Abstract: We study non-invertible topological symmetry operators in massive quantum field theories in (1+1) dimensions. In phases where this symmetry is spontaneously broken […]
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 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 Speaker: Andrew McLeod, Edinburgh Title: Genealogical Constraints on Feynman Integrals
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 […]
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.
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 Speaker: Jacob Bourjaily, Penn State Title: The Algebraic and Transcendental Structure of Perturbative QFT
Mathematical Aspects of Scattering Amplitudes Lecture Speaker: Ruth Britto, Trinity Title: Cuts and Symbols
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 […]