Phys. Rev. A 57, R28 - R31 (1998)Josephson effect between trapped Bose-Einstein condensates |
Ivar Zapata and Fernando Sols
Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
Anthony J. Leggett
Department of Physics, University of Illinois at Urbana–Champaign, 1110 West Green Street, Urbana, Illinois 61801
Received 14 July 1997
We study the Josephson effect between atomic Bose-Einstein condensates. By drawing on an electrostatic analogy, we derive a semiclassical functional expression for the three-dimensional Josephson coupling energy in terms of the condensate density. Estimates of the capacitive energy and of the Josephson plasma frequency are also given. The effect of dissipation due to the incoherent exchange of normal atoms is analyzed. We conclude that coherent Josephson dynamics may already be observable in current experimental systems.
©1998 The American Physical Society
URL: http://link.aps.org/abstract/PRA/v57/pR28
DOI: 10.1103/PhysRevA.57.R28
PACS: 03.75.Fi, 74.50.+r, 05.30.Jp, 32.80.Pj
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