论文标题
连贯性和热力学不确定性关系：量子吸收冰箱的见解
Coherences and the thermodynamic uncertainty relation: Insights from quantum absorption refrigerators
论文作者
论文摘要
最初用于经典的马尔可夫跳跃过程得出的热力学不确定性关系提供了精度和耗散之间的权衡关系，从而加深了我们对量子热机的性能的理解。在这里，我们研究了量子系统相干的相互作用和热力学不确定性关系中量子状态的有效性的相互作用。为了获得当前的统计数据，我们对Redfield Quantum Master方程进行了完整的计数统计模拟。我们专注于稳态量子吸收冰箱，与不连贯的极限相比，本征态之间非零的相干性可以抑制或增强冷却能力。在两种情况下，我们都会在存在系统相干性的情况下发现冷却功率的相对噪声（均值对均值的标准偏差）的相对噪声增强，从而证实了热力学不确定性关系。我们的结果表明，在评估量子相干热机的性能时，波动需要考虑。
The thermodynamic uncertainty relation, originally derived for classical Markov-jump processes, provides a trade-off relation between precision and dissipation, deepening our understanding of the performance of quantum thermal machines. Here, we examine the interplay of quantum system coherences and heat current fluctuations on the validity of the thermodynamics uncertainty relation in the quantum regime. To achieve the current statistics, we perform a full counting statistics simulation of the Redfield quantum master equation. We focus on steady-state quantum absorption refrigerators where nonzero coherence between eigenstates can either suppress or enhance the cooling power, compared with the incoherent limit. In either scenario, we find enhanced relative noise of the cooling power (standard deviation of the power over the mean) in the presence of system coherence, thereby corroborating the thermodynamic uncertainty relation. Our results indicate that fluctuations necessitate consideration when assessing the performance of quantum coherent thermal machines.
