论文标题
通过有限温度状态的人口转移
Population transfer via a finite temperature state
论文作者
论文摘要
我们研究最初以有限温度$ t $的热平衡中的公共中间状态进行量子种群转移，表现出多级刺激的拉曼绝热通道结构。我们考虑了共同中间状态的两种情况，即离散的两级自旋和波斯型连续体。在这两种情况下，我们都表明，有限温度强烈影响人口转移的效率。在离散的情况下，我们还表明，与中间状态的强耦合或受控脉冲的持续时间更长会抑制有限温度的效果。在连续情况下，我们适应了基于热场的链映射矩阵量算法，以研究系统的时间演变以及在时间依赖性控制的脉冲下的连续体，这表明了用于解决量子光学量子中的开放量子系统问题的巨大潜力。
We study quantum population transfer via a common intermediate state initially in thermal equilibrium with a finite temperature $T$, exhibiting a multi-level Stimulated Raman adiabatic passage structure. We consider two situations for the common intermediate state, namely a discrete two-level spin and a bosonic continuum. In both cases we show that the finite temperature strongly affects the efficiency of the population transfer. We also show in the discrete case that strong coupling with the intermediate state, or a longer duration of the controlled pulse would suppress the effect of finite temperature. In the continuous case, we adapt the thermofield-based chain-mapping matrix product states algorithm to study the time evolution of the system plus the continuum under time-dependent controlled pulses, which shows a great potential to be used to solve open quantum system problems in quantum optics.
