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arXiv 0909.2621cond-mat.quant-gasquant-ph
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一维玻色气体中暗孤子形成和动力学的量子和热效应

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

A. D. Martin, J. Ruostekoski

摘要:

数值研究了玻色原子气体中暗孤子在紧束缚一维谐振子阱中的烙印和动力学行为,包括有无光晶格。在准凝聚描述中,在截断的维格纳近似下合成了量子涨落和热涨落。我们跟踪孤子坐标和计算位置和速度的不确定性。我们发现相位起伏{ \em}降低了经典预言的孤子速度和种子不稳定性。单独的运行显示孤子与声波的相互作用,分裂和消失的孤子。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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