论文标题
控制具有调制幅度驱动器的量子热发动机的热力学
Controlling thermodynamics of a quantum heat engine with modulated amplitude drivings
论文作者
论文摘要
具有非平衡量子发动机的相位相差的浴温温度的外部驾驶会导致几何作用对热力学产生。在这项工作中，我们通过引入包膜功能并研究几何影响对四级驱动量子热发动机的通量，噪声和效率，并研究几何影响的作用，从而调节外部驾驶方案的幅度。我们观察到，具有有限的调制包膜宽度会引入一个额外的控制旋钮，用于研究绝热极限的热力学。在存在几何效应的情况下，通量的优化以及相对于热诱导的量子相干的噪声变得可能是可能的，迄今为止，在没有包膜的情况下，正弦式驱动是不可能的。我们还报告了标准表达式中斜率的偏差和在振幅调制下具有几何效应的效率的标准表达式中的截距。此外，最近开发的通用结合了从热力学不确定性关系获得的效率，当调制包络的较小宽度以及保持较大的空腔温度值时，没有保持。
External driving of bath temperatures with a phase difference of a nonequilibrium quantum engine leads to the emergence of geometric effects on the thermodynamics. In this work, we modulate the amplitude of the external driving protocols by introducing envelope functions and study the role of geometric effects on the flux, noise and efficiency of a four-level driven quantum heat engine coupled with two thermal baths and a unimodal cavity. We observe that having a finite width of the modulation envelope introduces an additional control knob for studying the thermodynamics in the adiabatic limit. The optimization of the flux as well as the noise with respect to thermally induced quantum coherences becomes possible in presence of geometric effects, which is hitherto not possible with sinusoidal driving without an envelope. We also report the deviation of the slope and generation of an intercept in the standard expression for efficiency at maximum power as a function of Carnot efficiency in presence of geometric effects under the amplitude modulation. Further, a recently developed universal bound on the efficiency obtained from thermodynamic uncertainty relation is shown not to hold when a small width of the modulation envelope along with a large value of cavity temperature is maintained.
