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Quantum and thermal effects of dark solitons in a one-dimensional bose gas

Quantum and thermal effects of dark solitons in a one-dimensional bose gas
Quantum and thermal effects of dark solitons in a one-dimensional bose gas
We numerically study the imprinting and dynamics of dark solitons in a bosonic atomic gas in a tightly confined one-dimensional harmonic trap both with and without an optical lattice. Quantum and thermal fluctuations are synthesized within the truncated Wigner approximation in the quasicondensate description. We track the soliton coordinates and calculate position and velocity uncertainties. We find that the phase fluctuations lower the classically predicted soliton speed and seed instabilities. Individual runs show interactions of solitons with sound waves, splitting, and disappearing solitons.
194102-[4pp]
Martin, A.D.
642fdaf4-ea13-4e82-9ef1-a4bd5a507364
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Martin, A.D.
642fdaf4-ea13-4e82-9ef1-a4bd5a507364
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4

Martin, A.D. and Ruostekoski, J. (2010) Quantum and thermal effects of dark solitons in a one-dimensional bose gas. Physical Review Letters, 104, 194102-[4pp]. (doi:10.1103/PhysRevLett.104.194102).

Record type: Article

Abstract

We numerically study the imprinting and dynamics of dark solitons in a bosonic atomic gas in a tightly confined one-dimensional harmonic trap both with and without an optical lattice. Quantum and thermal fluctuations are synthesized within the truncated Wigner approximation in the quasicondensate description. We track the soliton coordinates and calculate position and velocity uncertainties. We find that the phase fluctuations lower the classically predicted soliton speed and seed instabilities. Individual runs show interactions of solitons with sound waves, splitting, and disappearing solitons.

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Published date: 12 May 2010

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Local EPrints ID: 151995
URI: http://eprints.soton.ac.uk/id/eprint/151995
PURE UUID: 4b5866e7-523e-4a3b-8169-4ebf174cd998

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Date deposited: 13 May 2010 08:27
Last modified: 08 Nov 2021 18:27

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Contributors

Author: A.D. Martin
Author: J. Ruostekoski

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