发表机构
School of Physics, University of Hyderabad（海德拉巴大学物理学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究非准静态绝热冲程下量子卡诺与奥托热机的效率涨落，基于一维盒子量子粒子模型结合两点测量方案，揭示活塞速度引入的量子涨落会改变热机平均效率。
AI 中文摘要
我们对量子卡诺热机和奥托热机的效率涨落开展了分析与数值研究，这两种热机的活塞在以恒定速度进行非准静态绝热膨胀与压缩过程的同时，还伴随准静态等温过程（针对卡诺热机）或等容过程（针对奥托热机）。在此方面，我们考虑了绝热冲程期间的两点测量方案。通过将每个活塞视为一维盒子中具有非准静态可移动边界的单个量子粒子，我们捕捉到了非平衡过程中系统量子态幺正演化所产生的功输出的随机性质。此外，我们明确展示了量子非平衡冲程期间的活塞速度如何引入额外的量子涨落，进而改变两种热机的平均效率。
英文摘要
We have presented an analytical and numerical study of efficiency fluctuations in quantum Carnot and Otto engines with pistons operating under non-quasi-static adiabatic expansion and compression processes at constant speed, along with quasi-static isothermal (for the Carnot engine) or isochoric processes (for the Otto engine). We have considered the two-point measurement scheme during the adiabatic strokes in this regard. By considering each of the pistons as a single quantum particle in a 1-D box with a non-quasi-statically movable boundary, we capture the stochastic nature of the work output resulting from the unitary evolution of the quantum mechanical state of the system during non-equilibrium processes. Furthermore, we have explicitly shown how the piston speed during quantum non-equilibrium strokes introduces additional quantum fluctuations that modify the average efficiency of both the engines.
Comments11 pages, 6 figures
