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

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

2011-09-12

arxiv.org/abs/1109.2401v1

Physics

Condensed Matter

Quantum Gases

13 pages, 10 figures, one table

Scientific paper

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 temperatureacts as a simple dephasing.

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