Decoherence of two qubits in non-Markovian reservoirs without the rotating-wave approximation
Wang Fa-Qiang, Zhi‐Ming Zhang, Ruisheng Liang · Physical Review A · 2008
The decoherence of two initially entangled qubits in non-Markovian reservoirs has been investigated exactly without Born-Markovian approximation or rotating-wave approximation (RWA). The nonperturbative quantum master equation is derived and its exact solution is obtained. The decoherence behavior of two qubits, initially entangled in Bell states, has been investigated in the weak coupling regime and strong coupling regime. The results show that the counter-rotating wave terms have obvious influence on the decoherence behavior in the non-Markovian regime.