为量子点功率采集设计量子临界点

Jin-Yi Wang, Lei-Lei Nian, Jing-Tao Lü
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引用次数: 0

摘要

将量子点电路与微波光子耦合,可以研究光子辅助的量子传输。在这里,我们通过引入光子的克尔非线性,重新审视了这种典型的电路量子电动力学设置。通过利用量子临界行为,我们提出了一种强大的方案来控制微波系统中的功率收集效率,其中驱动耗散光学系统充当了能量泵的角色。它在量子点电路的负载下驱动电子传输。在临界点附近,能量转移以及由此产生的能量收集效率会得到提高。随着临界点向低输入功率移动,在实验参数范围内实现了高效率。我们的研究结果补充了纳米尺度光子-电子转换的基础研究,并为利用量子临界点设计集成光电器件提供了实际指导。
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Engineering quantum criticality for quantum dot power harvesting
Coupling quantum-dot circuits to microwave photons allows one to study the photon-assisted quantum transport. Here, we revisit this typical circuit quantum electrodynamical setup by introducing the Kerr nonlinearity of photons. By exploiting a quantum critical behavior, we propose a powerful scheme to control the power harvesting efficiency in the microwave regime, where the driven-dissipative optical system acts as an energy pump. It drives electron transport against a load in quantum-dot circuit. The energy transfer and consequently the harvesting efficiency is enhanced near the critical point. As the critical point moves towards to low input power, the high efficiency within experimental parameters is achieved. Our results complement fundamental studies of photon-to-electron conversion at the nanoscale, and provide practical guidance for the design of integrated photoelectric device by the quantum criticality.
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