Colloquia & Seminars

Title: Non-dispersive one-way signal amplification in sonic metamaterials

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 processing and loss mitigation. The fundamental mechanism for signal amplification of this kind is the parametric amplifier--an oscillator whose stiffness is periodically modulated in time, which can inject energy into mechanical oscillations. Typically, parametric amplification occurs at distinct modulation frequencies that are trivially related to the resonance modes of the unmodulated system, which restricts its utility for amplifying signals with complex spatial or...

Speaker: Sarah Harrison

Title: Colloquium

Colloquium Speaker: Sarah Harrison, Northeastern University

Speaker: Albert Law

Title: General Relativity Seminar

General Relativity Seminar Speaker: Albert Law, Stanford

Title: Member Seminar

CMSA Member Seminar Speaker: Sergiy Verstyuk

Speaker: Eric Pichon-Pharabod

Title: Algebraic Geometry in String Theory Seminar

Algebraic Geometry in String Theory Seminar Speaker: Eric Pichon-Pharabod, Universite Paris-Saclay

Title: Quantum Matter in Mathematics and Physics Seminar

Quantum Matter in Mathematics and Physics Seminar

Speaker: Robert Moscrop

Title: Member Seminar

CMSA Member Seminar Speaker: Robert Moscrop, Harvard CMSA

Speaker: Mikhail Molodyk

Title: General Relativity Seminar

General Relativity Seminar Speaker: Mikhail Molodyk, Stanford

Title: General Relativity Seminar

General Relativity Seminar Speaker: Marcelo Disconzi, Vanderbilt University

Title: Member Seminar

CMSA Member Seminar Speaker: Jue Liu

Speaker: Franco Rota

Title: Algebraic Geometry in String Theory Seminar

Algebraic Geometry in String Theory Seminar Speaker: Franco Rota, University of Glasgow

Title: Active Matter Seminar

Active Matter Seminar Speaker: Kevin Mitchell, University of California, Merced

Speaker: Mikhail Ivanov

Title: Love and Naturalness

Quantum 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...