Experimental investigation of classical and quantum correlations under decoherence
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DOI码：10.1038/ncomms1005
发表刊物：Nature Communications
摘要：It is well known that many operations in quantum information processing depend largely on a special kind of quantum correlation, that is, entanglement. However, there are also quantum tasks that display the quantum advantage without entanglement. Distinguishing classical and quantum correlations in quantum systems is therefore of both fundamental and practical importance. In consideration of the unavoidable interaction between correlated systems and the environment, understanding the dynamics of correlations would stimulate great interest. In this study, we investigate the dynamics of different kinds of bipartite correlations in an all-optical experimental setup. The sudden change in behaviour in the decay rates of correlations and their immunity against certain decoherences are shown. Moreover, quantum correlation is observed to be larger than classical correlation, which disproves the early conjecture that classical correlation is always greater than quantum correlation. Our observations may be important for quantum information processing.
合写作者：Xiao-Ye Xu,Cheng-Jie Zhang,Guang-Can Guo
第一作者：Jin-Shi Xu
论文类型：期刊论文
通讯作者：Chuan-Feng Li,Xu-Bo Zou
论文编号：7
卷号：1
期号：-
页面范围：7
ISSN号：2041-1723
是否译文：否
发表时间：2010-04-01
收录刊物：SCI