Effects of environmental parameters to total, quantum and classical correlations

Effects of environmental parameters to total, quantum and classical correlations
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环境参数对总相关性、量子相关性和经典相关性的影响

DOI:
10.1088/1751-8113/40/40/009
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发表时间:
2006-12
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
通讯作者:
--
中科院分区:
其他
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我们用熵度量量化了总关联、量子关联和经典关联,并以海森堡二聚体为例,对量子系统中的这些关联进行了定量比较。我们的结果表明,在某些非零温度下,量子关联可能会超过经典关联,尽管前者在热涨落下比后者更脆弱。外场对经典关联的影响与量子关联有很大不同。
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.
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