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arXiv 0909.1068cond-mat.quant-gas
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一维分段常势中玻色子Bogoliubov方程的精确解

Exact Solution of Bogoliubov Equations for Bosons in One-Dimensional Piecewise Constant Potential

Daisuke Takahashi

摘要:

我们证明了具有分段常势的一维系统中的Bogoliubov方程总是可解的。特别地,我们详细分析了凝聚波函数为实值函数的情况,并给出了Bogoliubov激发波函数的显式表达式。通过这些解,我们考虑了两种类型的潜在的Bogoliubov激发的透射和反射特性,即,一个矩形的障碍和潜在的步骤。结果给出了反常隧穿效应和量子蒸发的简单而精确的例子。

英文摘要:

We show that Bogoliubov equations in one-dimensional systems with piecewise constant potentials can be always solved. In particular, we analyze in detail the case where the condensate wavefunction is a real-valued function, and give the explicit expressions for wavefunctions of Bogoliubov excitations. By means of these solutions, we consider transmission and reflection properties of Bogoliubov excitations for two types of potential, namely, a rectangular barrier and a potential step. The results yield simple and exact examples of anomalous tunneling effect and quantum evaporation.

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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