单自旋系统中相干各向异性的实验研究

IF 8.1 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Physical review letters Pub Date : 2024-10-28 DOI:10.1103/physrevlett.133.180401
Zhibo Niu, Yang Wu, Yunhan Wang, Xing Rong, Jiangfeng Du
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引用次数: 0

摘要

各向异性被定义为通过单元循环演化可以提取的最大功。它在评估量子系统的做功能力方面起着至关重要的作用。最近,量子相干性在功提取中的重要性在理论上得到了确认,它揭示了相干性更强的量子态与非相干的量子态相比具有更强的各向异性。然而,关于相干各向异性的实验研究仍然缺失。在此,我们报告了对单自旋系统中相干各向异性的实验研究。基于使用安其拉量子比特测量各向异性的方法,我们成功提取了非平衡态各向异性的相干和非相干成分。通过改变该状态的相干性,观察到了系统相干性的增加所引起的各向异性的增加。我们的工作揭示了量子热力学与量子信息论之间的相互作用,未来的研究可以进一步探索其他量子属性在热力学协议中的作用。
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Experimental Investigation of Coherent Ergotropy in a Single Spin System
Ergotropy is defined as the maximum amount of work that can be extracted through a unitary cyclic evolution. It plays a crucial role in assessing the work capacity of a quantum system. Recently, the significance of quantum coherence in work extraction has been theoretically identified, revealing that quantum states with more coherence possess more ergotropy compared to their dephased counterparts. However, an experimental study of the coherent ergotropy remains absent. Here, we report an experimental investigation of the coherent ergotropy in a single spin system. Based on the method of measuring ergotropy with an ancilla qubit, both the coherent and incoherent components of the ergotropy for the nonequilibrium state were successfully extracted. The increase in ergotropy induced by the increase in the coherence of the system was observed by varying the coherence of the state. Our work reveals the interplay between quantum thermodynamics and quantum information theory, future investigations could further explore the role other quantum attributes play in thermodynamic protocols.
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来源期刊
Physical review letters
Physical review letters 物理-物理:综合
CiteScore
16.50
自引率
7.00%
发文量
2673
审稿时长
2.2 months
期刊介绍: Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics: General physics, including statistical and quantum mechanics and quantum information Gravitation, astrophysics, and cosmology Elementary particles and fields Nuclear physics Atomic, molecular, and optical physics Nonlinear dynamics, fluid dynamics, and classical optics Plasma and beam physics Condensed matter and materials physics Polymers, soft matter, biological, climate and interdisciplinary physics, including networks
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