Force on a moving point impurity due to quantum fluctuations in a Bose-Einstein condensate

Journal Article · Sat Jul 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.013613· OSTI ID:20852953

Roberts, D C ^[1]

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1. Laboratoire de Physique Statistique de l'Ecole Normale Superieure, 24 rue Lhomond, Paris (France)

An analytic expression is derived for a force on a weak point impurity arising from the scattering of quantum fluctuations in a slow-moving, weakly interacting, three-dimensional Bose-Einstein condensate at zero temperature. In an infinitely extended geometry, this force is shown to exist at any arbitrarily small flow velocity below Landau's critical velocity. Furthermore, this force is shown to be directly proportional to the flow speed.

• OSTI ID: 20852953
• Journal Information: Physical Review. A, Vol. 74, Issue 1; Other Information: DOI: 10.1103/PhysRevA.74.013613; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
CRITICAL VELOCITY
FLUCTUATIONS
GEOMETRY
IMPURITIES
SCATTERING
SUPERFLUIDITY
THREE-DIMENSIONAL CALCULATIONS