Entanglement detection via entropies in spinor Bose gases

Abstract

Simultaneous measurements of two non-commuting spin observables allows for direct access to a quasi-probability distribution and its associated entropy. In the Gaussian regime, this corresponds to the Husimi Q-distribution and Wehrl entropy, respectively. We analytically and numerically model the system and measure a non-zero Wehrl mutual information—a perfect entanglement witness for pure states. We present a preliminary analysis of experimental data that shows for certain times non-zero Wehrl mutual information is observed.

Date
Jun 29, 2021
Location
Heidelberg, Germany
Oliver Stockdale
Oliver Stockdale
PhD student in Physics

My research interests include ultracold quantum gases, entanglement detection, entropic uncertainty relations, and superfluidity