Dynamics of F=1 Rb87 condensates at finite temperatures

J. Mur-Petit, M. Guilleumas, A. Polls, A. Sanpera, M. Lewenstein, K. Bongs, and K. Sengstock
Phys. Rev. A 73, 013629 – Published 31 January 2006

Abstract

We investigate the dynamics of a F=1 spinor Bose-Einstein condensate of Rb87 atoms confined in a quasi-one-dimensional trap both at zero and at finite temperature. At zero temperature, we observe coherent oscillations between populations of the various spin components and the formation of multiple domains in the condensate. We study also finite temperature effects in the spin dynamics taking into account the phase fluctuations in the Bogoliubov-de Gennes framework. At finite T, despite complex multidomain formation in the condensate, population equipartition occurs. The length scale of these spin domains seems to be determined intrinsically by nonlinear interactions.

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  • Received 27 July 2005

DOI:https://doi.org/10.1103/PhysRevA.73.013629

©2006 American Physical Society

Authors & Affiliations

J. Mur-Petit1, M. Guilleumas1, A. Polls1, A. Sanpera2, and M. Lewenstein3,4

  • 1Departament d’Estructura i Constituents de la Matèria, Facultat de Física, Universitat de Barcelona, E-08028 Barcelona, Spain
  • 2ICREA and Grup de Física Teòrica, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
  • 3ICREA and ICFO-Institut de Ciències Fotòniques, E-08034 Barcelona, Spain
  • 4Institut für Theoretische Physik, Universität Hannover, D-30167 Hannover, Germany

K. Bongs and K. Sengstock

  • Institut für Laser-Physik, Universität Hamburg, D-22761 Hamburg, Germany

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Vol. 73, Iss. 1 — January 2006

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