The European Physical Journal B

, Volume 68, Issue 3, pp 335–339 | Cite as

Dephasing in two decoupled one-dimensional Bose-Einstein condensates and the subexponential decay of the interwell coherence

Article

Abstract

We provide a simple physical picture of the loss of coherence between two coherently split one-dimensional Bose-Einstein condensates. The source of the dephasing is identified with nonlinear corrections to the elementary excitation energies in either of the two independent condensates. We retrieve the result by Burkov, Lukin and Demler [Phys. Rev. Lett. 98, 200404 (2007)] on the subexponential decay of the coherence ∝exp [-(t/t0)2/3] for the large time t, however, the scaling of t0 differs.

PACS

03.75.Gg Entanglement and decoherence in Bose-Einstein condensates 03.75.Kk Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  1. 1.Atominstitut der Österreichischen UniversitätenViennaAustria
  2. 2.A.F. Ioffe Physico-Technical InstituteSt. PetersburgRussia

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