Spin squeezing in Bose–Einstein condensates: Limits imposed by decoherence and non-zero temperature

doi:10.1007/s11467-011-0219-7

Front. Phys.

0, Vol.

Issue () : 86-97 https://doi.org/10.1007/s11467-011-0219-7

REVIEW ARTICLE

Spin squeezing in Bose–Einstein condensates: Limits imposed by decoherence and non-zero temperature

Alice Sinatra(

), Jean-Christophe Dornstetter, Yvan Castin

Laboratoire Kastler Brossel, Ecole Normale Supérieure, UPMC and CNRS, Paris, France

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Abstract

We consider dynamically generated spin squeezing in interacting bimodal condensates. We show that particle losses and non-zero temperature effects in a multimode theory completely change the scaling of the best squeezing for large atom numbers. We present the new scalings and we give approximate analytical expressions for the squeezing in the thermodynamic limit. Besides reviewing our recent theoretical results, we give here a simple physical picture of how decoherence acts to limit the squeezing. We show in particular that under certain conditions the decoherence due to losses and non-zero temperature acts as a simple dephasing.

Keywords Bose–Einstein condensate decoherence

Corresponding Author(s): Sinatra Alice,Email:alice.sinatra@lkb.ens.fr

Issue Date: 01 February 2012

Cite this article:

Alice Sinatra,Jean-Christophe Dornstetter,Yvan Castin. Spin squeezing in Bose–Einstein condensates: Limits imposed by decoherence and non-zero temperature[J]. Front. Phys. , 0, (): 86-97.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-011-0219-7
https://academic.hep.com.cn/fop/EN/Y0/V/I/86

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