Quantum dynamics of instability-induced pulsations of a Bose-Einstein condensate in an optical lattice
Quantum dynamics of instability-induced pulsations of a Bose-Einstein condensate in an optical lattice
We study quantum dynamics of a Bose-Einstein condensate in a one-dimensional optical lattice in the limit of weak atom-atom interactions within the truncated Wigner approximation for a system with one dynamically
unstable mode. This extends previous classical studies of a pulsating dynamical instability in which atoms
periodically collect together and subsequently disperse back into the initial homogeneous state. We observe
that the quasiperiodic behavior still persists in the presence of quantum fluctuations for a single realization that represents a typical experimental outcome, but ensemble averages show various manifestations of quantum statistics. Quantum effects become more prominent when the effective interaction strength is increased.
043617-[13pp]
Shrestha, Uttam
308de33b-78cf-40f5-903d-78e91ba77f1f
Javanainen, Juha
ae127878-c1cf-4e23-bebb-c3ec76b61081
Ruostekoski, Janne
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
16 April 2009
Shrestha, Uttam
308de33b-78cf-40f5-903d-78e91ba77f1f
Javanainen, Juha
ae127878-c1cf-4e23-bebb-c3ec76b61081
Ruostekoski, Janne
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Shrestha, Uttam, Javanainen, Juha and Ruostekoski, Janne
(2009)
Quantum dynamics of instability-induced pulsations of a Bose-Einstein condensate in an optical lattice.
Physical Review A, 79 (4), .
(doi:10.1103/PhysRevA.79.043617).
Abstract
We study quantum dynamics of a Bose-Einstein condensate in a one-dimensional optical lattice in the limit of weak atom-atom interactions within the truncated Wigner approximation for a system with one dynamically
unstable mode. This extends previous classical studies of a pulsating dynamical instability in which atoms
periodically collect together and subsequently disperse back into the initial homogeneous state. We observe
that the quasiperiodic behavior still persists in the presence of quantum fluctuations for a single realization that represents a typical experimental outcome, but ensemble averages show various manifestations of quantum statistics. Quantum effects become more prominent when the effective interaction strength is increased.
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Published date: 16 April 2009
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Local EPrints ID: 65999
URI: http://eprints.soton.ac.uk/id/eprint/65999
ISSN: 1050-2947
PURE UUID: e519cfb9-db49-4381-b15c-32728f4fcf31
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Date deposited: 17 Apr 2009
Last modified: 13 Mar 2024 18:05
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Author:
Uttam Shrestha
Author:
Juha Javanainen
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