Driven spin systems as quantum thermodynamic machines: fundamental limits.
Driven spin systems as quantum thermodynamic machines: fundamental limits.
复制标题
DOI：
10.1103/physreve.75.051118
复制
发表时间：
2007-05
期刊：
影响因子：
--
通讯作者：
M. Henrich;G. Mahler;M. Michel
中科院分区：
文献类型：
--
作者：
M. Henrich;G. Mahler;M. Michel
我们证明了量子信息处理中研究的量子比特等耦合两级系统可以用作热力学机器。至少三个量子位或自旋是必要的，它们必须排列成一条链。该系统连接在两个分离槽之间，中间的工作旋转是外部驱动的。该机器进行卡诺式循环，并能够作为热泵或发动机工作，这取决于浴池的温差德尔塔和旋转系统的能量差德尔塔。可以证明，效率是delta和delta的函数。
We show that coupled two-level systems like qubits studied in quantum-information processing can be used as a thermodynamic machine. At least three qubits or spins are necessary and they must be arranged in a chain. The system is interfaced between two split baths and the working spin in the middle is externally driven. The machine performs Carnot-type cycles and is able to work as a heat pump or engine depending on the temperature difference of the baths, DeltaT , and the energy difference in the spin system, DeltaE . It can be shown that the efficiency is a function of DeltaT and DeltaE .