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Nonadiabatic dynamics of a Bose-Einstein condensate in an optical lattice

Nonadiabatic dynamics of a Bose-Einstein condensate in an optical lattice
Nonadiabatic dynamics of a Bose-Einstein condensate in an optical lattice
We study the nonequilibrium dynamics of a Bose-Einstein condensate that is split in a harmonic trap by turning up a periodic optical lattice potential. We evaluate the dynamical evolution of the phase coherence along the lattice and the number fluctuations in individual lattice sites within the stochastic truncated Wigner approximation when several atoms occupy each site. We show that the saturation of the number squeezing at high lattice strengths, which was observed in recent experiments by Orzel et al. [Science 291, 2386 (2001)] can be explained by the nonadiabaticity of the splitting.
1050-2947
011601R-[4pp]
Isella, Lorenzo
f6531d57-4173-47e5-8eef-4e131d91ea70
Ruostekoski, Janne
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Isella, Lorenzo
f6531d57-4173-47e5-8eef-4e131d91ea70
Ruostekoski, Janne
2beb155e-64b0-4ee9-9cfe-079947a9c9f4

Isella, Lorenzo and Ruostekoski, Janne (2005) Nonadiabatic dynamics of a Bose-Einstein condensate in an optical lattice. Physical Review A, 72 (1), 011601R-[4pp]. (doi:10.1103/PhysRevA.72.011601).

Record type: Article

Abstract

We study the nonequilibrium dynamics of a Bose-Einstein condensate that is split in a harmonic trap by turning up a periodic optical lattice potential. We evaluate the dynamical evolution of the phase coherence along the lattice and the number fluctuations in individual lattice sites within the stochastic truncated Wigner approximation when several atoms occupy each site. We show that the saturation of the number squeezing at high lattice strengths, which was observed in recent experiments by Orzel et al. [Science 291, 2386 (2001)] can be explained by the nonadiabaticity of the splitting.

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Published date: 12 July 2005

Identifiers

Local EPrints ID: 29359
URI: http://eprints.soton.ac.uk/id/eprint/29359
ISSN: 1050-2947
PURE UUID: 0b297d1d-396e-48aa-906b-44305ac129d9

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Date deposited: 11 May 2006
Last modified: 09 Nov 2021 07:44

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Author: Lorenzo Isella

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