Quantum and thermal effects in dark soliton formation and dynamics in a 1D Bose gas

Details Quantum and thermal effects in dark soliton formation and dynamics in a 1D Bose gas Quantum and thermal effects in dark soliton formation and dynamics in a 1D Bose gas

2009-09-14

arxiv.org/abs/0909.2621v2

Phys. Rev. Lett. 104 (2010) 194102

Physics

Condensed Matter

Quantum Gases

4 pages, 3 figures; modified in response to referees' comments

Scientific paper

10.1103/PhysRevLett.104.194102

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 quasi-condensate description. We track the soliton coordinates and calculate position and velocity uncertainties. We find that the phase fluctuations {\em 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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