Effects of environmental parameters to total, quantum and classical correlations

被引:8
作者
Chan, Wen-Ling [1 ]
Cao, Jun-Peng
Yang, Dong
Gu, Shi-Jian
机构
[1] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
[2] Chinese Univ Hong Kong, Inst Theoret Phys, Hong Kong, Hong Kong, Peoples R China
[3] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
[4] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
关键词
D O I
10.1088/1751-8113/40/40/009
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We quantify the total, quantum and classical correlations with entropic measures, and quantitatively compare these correlations in a quantum system, as exemplified by a Heisenberg dimer which is subjected to the change of environmental parameters: temperature and nonuniform external field. Our results show that the quantum correlation may exceed the classical correlation at some nonzero temperatures, though the former is rather fragile than the latter under thermal fluctuation. The effect of the external field to the classical correlation is quite different from the quantum correlation.
引用
收藏
页码:12143 / 12152
页数:10
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