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arXiv 2102.01089quant-phcond-mat.stat-mech
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单比特麦克斯韦妖的量子过程推断

Quantum process inference for a single qubit Maxwell's demon

Xingrui Song, Mahdi Naghiloo, Kater Murch

摘要:

虽然量子测量理论是围绕密度矩阵和可观测量建立的,但热力学热力学定律是基于热机和制冷机中使用的过程。量子热力学的研究融合了这两种不同的范式。在这篇文章中,我们强调使用量子过程矩阵作为一种统一的语言来描述量子制度中的热力学过程。我们的实验表明,这在量子麦克斯韦恶魔的背景下,其中两个主要的量通常进行调查;平均工作提取$\langle W \rangle$和功效$γ$,它的措施如何有效地反馈操作使用所获得的信息。利用量子过程矩阵的工具,我们开发了这两个量的最佳反馈协议,并在超导电路QED装置中进行了实验研究。

英文摘要:

While quantum measurement theories are built around density matrices and observables, the laws of thermodynamics are based on processes such as are used in heat engines and refrigerators. The study of quantum thermodynamics fuses these two distinct paradigms. In this article, we highlight the usage of quantum process matrices as a unified language for describing thermodynamic processes in the quantum regime. We experimentally demonstrate this in the context of a quantum Maxwell's demon, where two major quantities are commonly investigated; the average work extraction $\langle W \rangle$ and the efficacy $γ$ which measures how efficiently the feedback operation uses the obtained information. Using the tool of quantum process matrices, we develop the optimal feedback protocols for these two quantities and experimentally investigate them in a superconducting circuit QED setup.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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