Spring 2024 Schedule
Monday
Colloquium: 4:30 pm - 5:40 pm ET
Tuesday
General Relativity Seminar: 11:00 am - 12:00 pm ET
CMSA Q&A Seminar: 12:30 pm - 1:30 pm ET
Wednesday
New Technologies in Mathematics Seminar: 2:00 pm - 3:00 pm ET
Thursday
Algebraic Geometry Pre-Seminar: 10:00 am - 10:30 am ET
Algebraic Geometry in String Theory Seminar: 10:30 am - 11:30 am ET
Active Matter Seminar: 1:00 pm - 2:30 pm ET, bi-weekly
Friday
Quantum Matter in Mathematics and Physics Seminar: 10:00 am - 11:30 am ET
Member Seminar: 12:00 pm - 1:00 pm ET
Category: Colloquium |
Speaker: Lance DixonTitle: The DNA of Particle ScatteringColloquium Speaker: Lance Dixon (SLAC, Stanford University) Title: The DNA of Particle Scattering Abstract: At the Large Hadron Collider, the copious scattering of quarks and gluons in quantum chromodynamics (QCD) produces Higgs bosons and many backgrounds to searches for new physics. At short distances, scattering in QCD can be evaluated in perturbation theory and leads to highly intricate, multivariate mathematical functions such as generalized polylogarithms. To gain further insight, one can study a cousin of QCD called planar N=4 super-Yang-Mills theory. Some processes in this theory can be computed to eighth order in perturbation theory, versus second or third order in QCD. The computation and analysis of these results rely on a Hopf algebra coaction on polylogarithms. Its maximal iteration... |
Category: CMSA Q&A Seminar |
Title: CMSA Q&A Seminar 4/30/2024Speaker: Lakshminarayanan Mahadevan Question: What is morphogenesis? (Morphogenesis: geometry and biology) |
Category: Active Matter Seminar |
Title: Non-dispersive one-way signal amplification in sonic metamaterialsActive Matter Seminar Speaker: Jayson Paulose, University of Oregon Title: Non-dispersive one-way signal amplification in sonic metamaterials Abstract: Parametric amplification -- injecting energy into waves via periodic modulation of system parameters -- is typically restricted to specific multiples of the modulation frequency. However, broadband parametric amplification can be achieved in active metamaterials which allow local parameters to be modulated both in space and in time. Inspired by the concept of luminal metamaterials in optics, we describe a mechanism for one-way amplification of sound waves across an entire frequency band using spacetime-periodic modulation of local stiffnesses in the form of a traveling wave. When the speed of the modulation wave approaches that of the speed of sound in the metamaterial... |
Category: Colloquium |
Speaker: Sarah HarrisonTitle: ColloquiumColloquium Speaker: Sarah Harrison, Northeastern University |
Category: General Relativity Seminar |
Speaker: Albert LawTitle: General Relativity SeminarGeneral Relativity Seminar Speaker: Albert Law, Stanford |
Category: Member Seminar |
Title: Member SeminarCMSA Member Seminar Speaker: Sergiy Verstyuk |
Category: Algebraic Geometry in String Theory Seminar |
Speaker: Eric Pichon-PharabodTitle: Algebraic Geometry in String Theory SeminarAlgebraic Geometry in String Theory Seminar Speaker: Eric Pichon-Pharabod, Universite Paris-Saclay |
Category: Quantum Matter |
Title: Quantum Matter in Mathematics and Physics SeminarQuantum Matter in Mathematics and Physics Seminar |
Category: Member Seminar |
Speaker: Robert MoscropTitle: Member SeminarCMSA Member Seminar Speaker: Robert Moscrop, Harvard CMSA |
Category: General Relativity Seminar |
Speaker: Mikhail MolodykTitle: General Relativity SeminarGeneral Relativity Seminar Speaker: Mikhail Molodyk, Stanford |
Category: General Relativity Seminar |
Title: General Relativity SeminarGeneral Relativity Seminar Speaker: Marcelo Disconzi, Vanderbilt University |
Category: Member Seminar |
Title: Member SeminarCMSA Member Seminar Speaker: Jue Liu |
Category: Algebraic Geometry in String Theory Seminar |
Speaker: Franco RotaTitle: Algebraic Geometry in String Theory SeminarAlgebraic Geometry in String Theory Seminar Speaker: Franco Rota, University of Glasgow |
Category: Active Matter Seminar |
Title: Active Matter SeminarActive Matter Seminar Speaker: Kevin Mitchell, University of California, Merced |
Category: Quantum Matter |
Speaker: Mikhail IvanovTitle: Love and NaturalnessQuantum Matter in Mathematics and Physics Seminar Speaker: Mikhail Ivanov (MIT) Title: Love and Naturalness Abstract: Recent progress in gravitational wave astronomy has spurred the development of efficient tools to describe gravitational binary dynamics. One such tool is classical worldline effective field theory (EFT). In the first part of my talk, I will show how to use this EFT for systematic studies of tidal heating and deformations (Love numbers) of compact objects. I will present a gauge-invariant definition of Love numbers and show how to extract them in a coordinate-independent way from scattering amplitudes of the gravitational Raman process. I will show that the worldline EFT exhibits strong fine-tuning when applied to black holes. This gives rise to a naturalness... |