Zero-temperature damping of Bose-Einstein condensate oscillations by vortex-antivortex pair creation

Journal Article · Tue Jul 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.011602· OSTI ID:20639852

Fedichev, Petr O ^[1]; Fischer, Uwe R ^[1]; Recati, Alessio ^[1]

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1. Institut fuer Theoretische Physik, Leopold-Franzens-Universitaet Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, (Austria)

We investigate vortex-antivortex pair creation in a supersonically expanding and contracting quasi-two-dimensional Bose-Einstein condensate at zero temperature. For sufficiently large-amplitude condensate oscillations, pair production provides the leading dissipation mechanism. The condensate oscillations decay in a nonexponential manner, and the dissipation rate depends strongly on the oscillation amplitude. These features allow one to distinguish the decay due to pair creation from other possible damping mechanisms. An experimental observation of the predicted oscillation behavior of the superfluid gas provides a direct confirmation of the hydrodynamical analogy of quantum electrodynamics and quantum vortex dynamics in two spatial dimensions.

• OSTI ID: 20639852
• Journal Information: Physical Review. A, Vol. 68, Issue 1; Other Information: DOI: 10.1103/PhysRevA.68.011602; (c) 2003 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
AMPLITUDES
BOSE-EINSTEIN CONDENSATION
DAMPING
DECAY
HYDRODYNAMICS
OSCILLATIONS
PAIR PRODUCTION
QUANTUM ELECTRODYNAMICS
SUPERFLUIDITY
TWO-DIMENSIONAL CALCULATIONS
VORTICES