Genuine phase diffusion of a Bose-Einstein condensate in the microcanonical ensemble: A classical field study

A. Sinatra and Y. Castin
Phys. Rev. A 78, 053615 – Published 10 November 2008

Abstract

Within the classical field model, we find that the phase of a uniform Bose-Einstein condensate at nonzero temperature undergoes a true diffusive motion in the microcanonical ensemble, the variance of the condensate phase change between time zero and time t growing linearly in t. The phase diffusion coefficient obeys a simple scaling law in the double thermodynamic and Bogoliubov limit. We construct an approximate calculation of the diffusion coefficient, in fair agreement with the numerical results over the considered temperature range, and we extend this approximate calculation to the quantum field.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
1 More
  • Received 10 August 2008

DOI:https://doi.org/10.1103/PhysRevA.78.053615

©2008 American Physical Society

Authors & Affiliations

A. Sinatra and Y. Castin

  • Laboratoire Kastler Brossel, Ecole Normale Supérieure, Université Pierre et Marie Curie and Centre National de la Recherche Scientifique, 24 Rue Lhomond, 75231 Paris Cedex 05, France

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 78, Iss. 5 — November 2008

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×