Atomic Physics Seminar: Gadi Afek, Weizmann Institute, “Observing Power-Law Dynamics of Position-Velocity Correlation in Anomalous Diffusion”

Event time: 
Wednesday, January 24, 2018 - 1:00pm to 2:00pm
Sloane Physics Laboratory (SPL), 52 See map
217 Prospect Street
New Haven, CT 06511
Event description: 

I will present a measurement of the phase-space density distribution (PSDD) of ultracold 87Rb atoms performing 1D anomalous diffusion. The PSDD is imaged using a direct tomographic method based on Raman velocity selection. It reveals that the position-velocity correlation function Cxv(t) builds up on a timescale related to the initial conditions of the ensemble and then decays asymptotically as a power-law. We show that the decay follows a simple scaling theory involving the power-law asymptotic dynamics of position and velocity. The generality of this scaling theory is confirmed using Monte Carlo simulations of two distinct models of anomalous diffusion.

G. Afek, J. Coslovsky, A. Courvoisier, O. Livneh, and N. Davidson, Observing Power-Law Dynamics of Position-Velocity Correlation in Anomalous Diffusion, Phys. Rev. Lett. 119, 060602 (2017)

Hosts: Nir Navon, David DeMille, Jack Harris, and David Moore