The Josephson plasmon as a Bogoliubov quasiparticle
The Josephson plasmon as a Bogoliubov quasiparticle
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作为 Bogoliubov 准粒子的约瑟夫森等离子体
DOI：
10.1088/0953-4075/34/23/313
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
A. Leggett
中科院分区：
文献类型：
--
作者：
G. Paraoanu;S. Kohler;S. Kohler;F. Sols;A. Leggett
我们在双模近似下研究了碱性原子气体中的约瑟夫森效应，证明了Bogoliubov描述与相表示的谐和极限之间的对应关系。我们证明了约瑟夫森等离子体激元的量子可以用两位点玻色流体的Bogoliubov激发来确定。因此，我们建立了多体理论的Bogoliubov近似和线性化的摆哈密顿量之间的映射。
We study the Josephson effect in alkali atomic gases within the two-mode approximation and show that there is a correspondence between the Bogoliubov description and the harmonic limit of the phase representation. We demonstrate that the quanta of the Josephson plasmon can be identified with the Bogoliubov excitations of the two-site Bose fluid. We thus establish a mapping between the Bogoliubov approximation for the many-body theory and the linearized pendulum Hamiltonian.