Optimizing quantum correlation dynamics by weak measurement in dissipative environment 被引量：1

Optimizing quantum correlation dynamics by weak measurement in dissipative environment

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摘要 We investigate the protection of quantum correlations of two qubits in independent vacuum reservoirs by means of weak measurements. It is found that the weak measurement can reduce the amount of quantum correlation for one type of initial state at the beginning in a non-Markovian environment and meanwhile it can reduce the occurrence time of entanglement sudden death （ESD） in the process of time evolution. In a Markovian environment, the quantum entanglements of the two kinds of initial states decay rapidly and the weak measurement can further weaken the quantum entanglement, therefore in this case the entanglement cannot be optimized in the evolution process. We investigate the protection of quantum correlations of two qubits in independent vacuum reservoirs by means of weak measurements. It is found that the weak measurement can reduce the amount of quantum correlation for one type of initial state at the beginning in a non-Markovian environment and meanwhile it can reduce the occurrence time of entanglement sudden death （ESD） in the process of time evolution. In a Markovian environment, the quantum entanglements of the two kinds of initial states decay rapidly and the weak measurement can further weaken the quantum entanglement, therefore in this case the entanglement cannot be optimized in the evolution process.

作者杜少将夏云杰段德洋张路高强

机构地区 Shandong Provincial Key Laboratory of Laser Polarization and Information Technology Department of Physics and Information Engineering

出处《Chinese Physics B》 SCIE EI CAS CSCD 2015年第4期221-226,共6页 中国物理B（英文版）

基金 Project supported by the National Natural Science Foundation of China(Grant Nos.61178012 and No.11147019)

关键词 quantum entanglement quantum correlation entanglement sudden death weak measurement quantum entanglement, quantum correlation, entanglement sudden death, weak measurement

分类号 O413.1 [理学—理论物理]

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