Connections of Coherent Information,Quantum Discord,and Entanglement
Connections of Coherent Information,Quantum Discord,and Entanglement
摘要
For a pure non-markovian dephasing model we derive analytic expressions of coherent information,quantum discord,and entanglement.We find that for the cases of the initial Werner states,the dynamical behavior of coherent information is similar to that of quantum discord but different from that of entanglement.Coherent information,as well as quantum discord,can reveal the quantum correlations in some mixed-states,in which the entanglement is zero.
基金
Supported by National Science Foundation of China under Grant Nos. 11005008,10974016,and 11075013
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