A Generalized Geometric Measurement of Quantum Discord: Exact Treatment
A Generalized Geometric Measurement of Quantum Discord: Exact Treatment
复制标题
量子不和谐的广义几何测量:精确处理
DOI:
10.1088/0253-6102/65/2/154
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发表时间:
2014-12
影响因子:
3.1
通讯作者:
Yang Gui
中科院分区:
文献类型:
--
作者:
Cui Hai-Tao;Tian Jun-Long;Yang Gui
A generalization of the geometric measure of quantum discord is introduced in this article, based on Hellinger distance. Our definition has virtues of computability and independence of local measurement. In addition it also does not suffer from the recently raised critiques about quantum discord. The exact result can be obtained for bipartite pure states with arbitrary levels, which is completely determined by the Schmidt decomposition. For bipartite mixed states the exact result can also be found for a special case. Furthermore the generalization into multipartite case is direct. It is shown that it can be evaluated exactly when the measured state is invariant under permutation or translation. In addition the detection of quantum phase transition is also discussed for Lipkin-Meshkov-Glick and Dicke model.
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DOI:
--
发表时间:
1998-03
期刊:
Dictionary of Geotourism
影响因子:
--
作者:
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通讯作者:
Klaus Völker
影响因子:
8.6
作者:
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影响因子:
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作者:
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影响因子:
44.1
作者:
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通讯作者:
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影响因子:
8.6
作者:
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通讯作者:
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