Entanglement for Two-Qubit Extended Werner-Like States:Effect of Non-Markovian Environments

【摘要】 <正> We investigate the sudden birth and sudden death of entanglement of two qubits interacting with uncorrelatedstructured reservoirs.The system is initially prepared in two-qubit extended Werner-like state.We workout the dependence of the entanglement dynamics on both non-Markovian environments and the purity of initial state,and show that non-Markovian environments and the purity can control the time of the two-qubit entanglement suddendeath and the reservoirs’ entanglement sudden birth.Furthermore,under the conditions of different purity and initialentanglement,the revival of qubits’ entanglement can manifest before,simultaneously or even after the disentanglementof their corresponding reservoirs.更多还原

【Abstract】 We investigate the sudden birth and sudden death of entanglement of two qubits interacting with uncorrelated structured reservoirs.The system is initially prepared in two-qubit extended Werner-like state.We work out the dependence of the entanglement dynamics on both non-Markovian environments and the purity of initial state, and show that non-Markovian environments and the purity can control the time of the two-qubit entanglement sudden death and the reservoirs’ entanglement sudden birth.Furthermore,under the conditions of different purity and initial entanglement,the revival of qubits’ entanglement can manifest before,simultaneously or even after the disentanglement of their corresponding reservoirs.更多还原