Influence of detuning on entanglement in non-Markovian channels

Quantum entanglement between two qubits was obtained by solving the model of two qubits coupled to two independent reservoirs. This paper studied the influences of dissipative environment, detuning between transition frequency of the qubit and center frequency of a cavity. Results showed that: (1) In the non-Markovian channel, a certain amount of detuning was conducive to maintain and improve the entanglement of a system. (2) On the other hand, in a two-sided amplitude damping channel, the composite effect of two independent dissipative channels would appear through the entanglement between two qubits. Given the composite effect of two independent channels, the entanglement dynamics not only affected the Markovian process but also hindered the backflow effect of the non-Markovian channel, which was not conducive to maintain the entanglement between qubits. (C) 2015 Elsevier GmbH. All rights reserved.