Optimizing quantum correlation dynamics by weak measurement in dissipative environment
Shao-Jiang Du, Yun‐Jie Xia, Deyang Duan, Lu Zhang, Qiang Gao · Chinese Physics B · 2015
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.