论文标题
基于连贯或挤压状态的量子工作统计数据的单个测量方案
A single measurement scheme for quantum work statistics based on coherent or squeezing state
论文作者
论文摘要
为了研究初始量子相干性在工作概率分布中的作用，有必要明确考虑一个具体的测量设备来记录工作，而不是隐含地吸引进行能量测量。在本文中，我们将具有连贯或挤压状态的谐波振荡器视为测量设备，并提出了一个统一的量子工作统计框架，以进行任意初始状态。我们发现工作与连贯状态参数的实际部分的变化成正比，即可以通过相干状态参数估算量子工作。由此产生的工作概率分布包括初始量子相干性，可以通过挤压谐波振荡器的状态来减少两个传统的投影能量测量方案（TPM）。作为应用程序，我们考虑了一个驱动的两级系统，并研究了驱动速度对工作统计数据的影响。我们发现，只有当驾驶速度与系统的过渡频率匹配时，初始量子相干性才能起重要作用。
In order to investigate the role of initial quantum coherence in work probability distribution, it is necessary to explicitly consider a concrete measurement apparatus to record work rather than implicitly appealing to perform an energy measurement. In this paper, we consider a harmonic oscillator with coherent or squeezing state as measurement apparatus, and propose a unified framework of quantum work statistics for arbitrary initial state. We find that work is proportional to the change of the real part of coherent state parameter, i.e., quantum work can be estimated by the coherent state parameter. The resulting work probability distribution includes the initial quantum coherence, and can be reduced to result of traditional two projective energy measurement scheme (TPM) by squeezing the state of the harmonic oscillator. As an application, we consider a driven two-level system and investigate the effects of driving velocity on work statistics. We find that only when the driving velocity matches the transition frequency of the system can initial quantum coherence play an important role.
