Dissipative dynamics of a driven two-level quantum dot interacting with a structured reservoir with two-peaked spectrum

作者：Guo Xiaoyong; Ren Zhongzhou; Guo Guangjie; Zhou Bo

来源：Canadian Journal of Physics, 2012, 90(9): 895-901.

DOI：10.1139/P2012-084

In this paper, we investigate the dissipative dynamics of a driven two-level quantum dot weakly coupled with a structured reservoir that is characterized by a double-peaked spectral function. We discuss the time-dependent dissipation coefficients and the Bloch vector by using a time-local non-markovian master equation. It is shown that the decay rates display temporarily negative values that can be manipulated by the distance between the two peaks in the spectral function. For the strong pumping case, the nonsecular effect gives rise to the non-markovian dynamics of the Bloch vector. However, for the weak pumping case, the non-markovian dynamics show up when contributions from secular and nonsecular terms are comparable. hi the long time limit, the signature of non-markovian dynamics disappears and the behavior obeys Fermi';s golden rule.

• 出版日期2012-9
• 单位南京大学