论文标题
在洛伦兹玻色储库中的两级系统的非马克维亚抗熔点和具有有限相关时间的随机环境
Non-Markovian decoherence of a two-level system in a Lorentzian bosonic reservoir and a stochastic environment with finite correlation time
论文作者
论文摘要
在本文中，我们研究了在外部经典波动环境的影响下，在骨浴中的两级系统（QUBIT）的非马克维亚进化。与浴缸的相互作用具有Lorentzian光谱密度，并且波动环境（随机场）由一组Ornstein-Uhlenbeck过程表示。复合环境的每个亚环境都能够诱导两级系统的非马克维亚动力学。通过数值精确的运动方程方法，我们研究了两级系统的稳态，密度矩阵进化的降低以及平衡发射光谱对频率截止的频谱和亚环环境的耦合强度。此外，我们研究了用于与浴缸相互作用的旋转波近似（RWA）的影响。
In this paper we investigate non-Markovian evolution of a two-level system (qubit) in a bosonic bath under influence of an external classical fluctuating environment. The interaction with the bath has the Lorentzian spectral density, and the fluctuating environment (stochastic field) is represented by a set of Ornstein-Uhlenbeck processes. Each of the subenvironments of the composite environment is able to induce non-Markovian dynamics of the two-level system. By means of the numerically exact method of hierarchical equations of motion, we study dependence of the steady states of the two-level system, the reduced density matrix evolution and the equilibrium emission spectrums on frequency cutoffs and coupling strengths of the subenvironments. Additionally we investigate the impact of the rotation-wave approximation (RWA) used for the interaction with the bath on accuracy of the results.
