On microscopic theory of spin-S Bose-Einstein condensate in a magnetic field

被引：5
|
作者：
Peletminskii, A. S.
Peletminskii, S. V. [1 ]
Slyusarenko, Yu. V.
机构：
[1] Ctr Nat Sci, Kharkov Phys & Technol Inst, Akhiezer Inst Theoret Phys, UA-61108 Kharkov, Ukraine
[2] Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy
来源：
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2007年 / 380卷
关键词：
Bose-Einstein condensation; spinor condensate; weakly interacting bose gas; quasiaverages; thermodynamics; excitation spectra;
D O I：
10.1016/j.physa.2007.02.107
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The ground state and low-lying collective modes of Bose-Einstein condensate (BEC) of atoms with arbitrary spin in a magnetic field is studied using Bogoliubov's model for weakly interacting Bose gas. The equation for vectorial order parameter valid at temperature T -> 0 is derived and its specific solution is found. This solution corresponds to the formation of BEC of atoms with a definite spin projection onto direction of magnetic field. We study the thermodynamic stability of the found ground state and obtain the expressions for low-lying collective modes. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：202 / 210
页数：9
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