Detecting multiparticle entanglement of Dicke states
Quantum Physics
2014-09-10 v2 Quantum Gases
Abstract
Recent experiments demonstrate the production of many thousands of neutral atoms entangled in their spin degrees of freedom. We present a criterion for estimating the amount of entanglement based on a measurement of the global spin. It outperforms previous criteria and applies to a wide class of entangled states, including Dicke states. Experimentally, we produce a Dicke-like state using spin dynamics in a Bose-Einstein condensate. Our criterion proves that it contains at least genuine 28-particle entanglement. We infer a generalized squeezing parameter of -11.4(5) dB.
Keywords
Cite
@article{arxiv.1403.4542,
title = {Detecting multiparticle entanglement of Dicke states},
author = {Bernd Lücke and Jan Peise and Giuseppe Vitagliano and Jan Arlt and Luis Santos and Geza Toth and Carsten Klempt},
journal= {arXiv preprint arXiv:1403.4542},
year = {2014}
}
Comments
5 pages, 4 figures