The Effect Of The Reservoirs’Spectral Density On Evolution Of Entanglement Between Two Qubits

In recent years, quantum entanglement has been widely concerned by the physicists, the impact of environment on quantum entanglement has been the important issues. In this paper, we study the relationship between the entanglement evolution of two qubits and the baths’ spectral density.We investigate the entanglement evolution of two qubits coupled to the reservoirs with different spectral densities. We also discuss how the entanglement evolution of two qubits depends on spectral peak width and interval, as well as the detuning. In addition, we show that the correlation between the qubits’ entanglement evolution and their initial state is dependent on the spectral density of the reservoir. The results indicate that the entanglement evolution of the two qubits can be controlled by changing their environment.