论文标题
基于测量的量子热机和反馈控制
Measurement-based quantum thermal machines with feedback control
论文作者
论文摘要
我们研究了由量子测量和反馈供电的基于耦合的基于Qubit的热机。我们考虑了两个不同版本的机器：1）量子麦克斯韦的恶魔，其中耦合量系统连接到可拆卸的单个共享浴室，以及2）一个测量辅助冰箱，其中耦合 - Qubit System与热水和冷浴室中的视频中有偶联。在量子麦克斯韦的恶魔案中，我们讨论了离散和连续测量。我们发现，通过将其耦合到第二个量子位，可以改善来自单个基于量子的设备的功率输出。我们进一步发现，与仅执行单量子测量的两个平行操作的两个设置相比，两个量子位的同时测量都可以产生更高的净萃取。在冰箱情况下，我们使用连续的测量和统一操作为基于Qubit的冰箱提供动力。我们发现，可以通过进行合适的测量来增强使用交换操作运行的冰箱的冷却能力。
We investigate coupled-qubit-based thermal machines powered by quantum measurements and feedback. We consider two different versions of the machine: 1) a quantum Maxwell's demon where the coupled-qubit system is connected to a detachable single shared bath, and 2) a measurement-assisted refrigerator where the coupled-qubit system is in contant with a hot and cold bath. In the quantum Maxwell's demon case we discuss both discrete and continuous measurements. We find that the power output from a single qubit-based device can be improved by coupling it to the second qubit. We further find that the simultaneous measurement of both qubits can produce higher net heat extraction compared to two setups operated in parallel where only single-qubit measurements are performed. In the refrigerator case, we use continuous measurement and unitary operations to power the coupled-qubit-based refrigerator. We find that the cooling power of a refrigerator operated with swap operations can be enhanced by performing suitable measurements.
