Anisotropic pseudopotential for polarized dilute quantum gases
Anisotropic pseudopotential for polarized dilute quantum gases
复制标题
DOI：
10.1103/physreva.67.033607
复制
发表时间：
2002-12
影响因子：
2.9
通讯作者：
A. Derevianko
中科院分区：
文献类型：
--
作者：
A. Derevianko
An anisotropic pseudopotential arising in the context of collisions of two particles polarized by an external field is rigorously derived and its properties are investigated. Such a low-energy pseudopotential may be useful in describing collective properties of dilute quantum gases, such as molecules polarized by an electric field or metastable 3 P2 atoms polarized by a magnetic field. The pseudopotential is expressed in terms of the reactance ~K! matrix and derivatives of the Dirac d function. In most applications, it may be represented as a sum of a traditional spherically symmetric contact term and an anisotropic part. The former contribution may be parametrized by a generalized scattering length. The anisotropic part of the pseudopotential may be characterized by the off-diagonal scattering length for dipolar interactions and off-diagonal scattering volume for quadrupolar interactions. The two-body matrix element of the pseudopotential in a basis of plane waves is also derived.
