The effects of different time-independent and time-dependent couplings on two-atom entanglement are studied. The results show that the effects depend on the initial state. For the initial state ｜eeO〉, it is found th...The effects of different time-independent and time-dependent couplings on two-atom entanglement are studied. The results show that the effects depend on the initial state. For the initial state ｜eeO〉, it is found that different time-independent couplings make the case without entanglement exhibit entanglement, and time-dependent couplings turn the irregular entanglement regions into regular one. Under the case of decay, for the initial state ｜eg0〉, the different time-dependent couplings have disbenefit.展开更多
We investigate entanglement dynamics of three independent qubits each locally interacting with a zero-temperature non-Markovian reservoir.The effects of environment's amount of non-Markovianity or parameters in in...We investigate entanglement dynamics of three independent qubits each locally interacting with a zero-temperature non-Markovian reservoir.The effects of environment's amount of non-Markovianity or parameters in initialstates on the three-qubit entanglement dynamics are presented in detail.It is found that the entanglement of such asystem revives after a finite dark period when a proper degree of non-Markovian is present.A deep comparison to thatin two-qubit system is also made.展开更多
基金The project supported by National Natural Science Foundation of China under Grant Nos. 10347103 and 10305002 and the Natural Science Foundation of Liaoning Province under Grant No. 20031073
文摘The effects of different time-independent and time-dependent couplings on two-atom entanglement are studied. The results show that the effects depend on the initial state. For the initial state ｜eeO〉, it is found that different time-independent couplings make the case without entanglement exhibit entanglement, and time-dependent couplings turn the irregular entanglement regions into regular one. Under the case of decay, for the initial state ｜eg0〉, the different time-dependent couplings have disbenefit.
基金supported by National Natural Science Foundation of China under Grant No.60573008
文摘We investigate entanglement dynamics of three independent qubits each locally interacting with a zero-temperature non-Markovian reservoir.The effects of environment's amount of non-Markovianity or parameters in initialstates on the three-qubit entanglement dynamics are presented in detail.It is found that the entanglement of such asystem revives after a finite dark period when a proper degree of non-Markovian is present.A deep comparison to thatin two-qubit system is also made.
