Spin Squeezing and Entanglement Quantification in Atomic Gases
December 1st, 2021 GIUSEPPE VITAGLIANO Institute for Quantum Optics and Quantum Information, Vienna

I will present some recent results on entanglement detection and quantification with collective spin measurements in many-body ensembles. After a brief review of the idea of “Spin Squeezing” and its relation with multipartite entanglement, I will focus on the quantification of entanglement by means of entanglement monotones with spin squeezing methods. I will consider broad families of entanglement criteria that are based on variances of arbitrary operators and analytically derive the lower bounds these criteria provide for two relevant entanglement measures: the best separable approximation (BSA) and the generalized robustness (GR). As a concrete application, I will show the results of applying this method with experimental data of a spin-squeezed Bose-Einstein condensates of ∼ 500 atoms.

Wednesday, December 1, 2021, 16:30. Seminar Room

Hosted by Prof Maciej Lewenstein/b>