弱内耦合制冷
Refrigeration beyond weak internal coupling
摘要：
我们研究了三自旋量子吸收制冷机的性能，使用一个改进的开放量子系统模型，适用于所有的自旋间耦合强度。它描述了以前的近似模型之间的过渡弱耦合和超强耦合的限制，并预测最佳制冷适度强耦合，这两个近似是不准确的。两个影响阻碍了更有效的冷却：自旋之间的耦合不再减少到一个简单的共振能量交换（旋转波近似失败），与热浴的相互作用变得敏感的水平分裂，从而打开额外的热通道之间的水库。我们确定了修改后的条件的制冷作为一个函数的自旋间耦合强度，我们表明，与直觉相反，高温工作水库阻碍制冷在强耦合制度。
英文摘要：
We investigate the performance of a three-spin quantum absorption refrigerator using a refined open quantum system model valid across all inter-spin coupling strengths. It describes the transition between previous approximate models for the weak and the ultrastrong coupling limit, and it predicts optimal refrigeration for moderately strong coupling, where both approximations are inaccurate. Two effects impede a more effective cooling: the coupling between the spins no longer reduces to a simple resonant energy exchange (the rotating wave approximation fails), and the interactions with the thermal baths become sensitive to the level splitting, thus opening additional heat channels between the reservoirs. We identify the modified conditions of refrigeration as a function of the inter-spin coupling strength, and we show that, contrary to intuition, a high-temperature work reservoir thwarts refrigeration in the strong coupling regime.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
