玻色凝聚体中的Andreev反射
Andreev reflection in bosonic condensates
摘要：
我们研究了在正常超流界面上Andreev反射的玻色子模拟，其中超流是玻色子凝聚体。我们将正常区域建模为非线性效应可以忽略的区域。在衰变凝聚的背景下，我们确定了一个新的贡献反射原子的电流。这种Andreev反射分量的群速度不同于正常反射分量的群速度。对于三维平面或二维线性界面，Andreev反射既不是镜面反射也不是共轭反射。
英文摘要：
We study the bosonic analog of Andreev reflection at a normal-superfluid interface where the superfluid is a boson condensate. We model the normal region as a zone where nonlinear effects can be neglected. Against the background of a decaying condensate, we identify a novel contribution to the current of reflected atoms. The group velocity of this Andreev reflected component differs from that of the normally reflected one. For a three-dimensional planar or two-dimensional linear interface Andreev reflection is neither specular nor conjugate.
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