STRONGLY CORRELATED INFORMAL THURSDAY SEMINAR

Thursday, November 16, 2017 at 10:15am to 11:15am

Physical Sciences Building, 416
245 East Avenue

Aavishkar Patel, Department of Physics, Harvard University, Cambridge, MA, will present seminar. Professor Eun-Ah Kim, host. 

Seminar Title: Many-body quantum chaos in correlated metals

Abstract: I will describe computations of parameters characterizing many-body quantum chaos in two different examples of interacting quantum metals. These parameters describe “scrambling”, i.e. the spread of quantum information across all of the degrees of freedom in a system leading to a loss of memory of the initial state, a process that is essential for thermalization. The first example consists of a metal with a Fermi surface coupled to a dynamical U(1) gauge field in two spatial dimensions.  This is a strongly interacting state of quantum matter without quasiparticles, and is consequently a fast scrambler. The thermal diffusivity of this metal is universally related to the parameters describing scrambling. The second example consists of a weakly interacting electron liquid subject to random potential disorder. Even though the electrons naturally exhibit diffusive motion in this system, quantum information about inelastic electron collisions spreads ballistically with a temperature-dependent velocity. In two spatial dimensions, the Lyapunov exponent parameterizing the rate of scrambling is universally related at weak coupling to the sheet resistivity of this metal

Poster available.

Event Type

Seminar

Departments

LASSP, Applied and Engineering Physics, Physics

Tags

lassp_and_aep_seminar

Website

http://www.lassp.cornell.edu/events/

Contact E-Mail

dem8@cornell.edu

Contact Name

Douglas E. Milton, Sr.

Contact Phone

(607)255-9684

Speaker

Aavishkar Patel

Speaker Affiliation

Harvard University

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