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arXiv 2403.04698quant-ph
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Qubit动力学中的ergotropy与环境诱导功

Qubit dynamics of ergotropy and environment-induced work

J. M. Z. Choquehuanca, P. A. C. Obando, F. M. de Paula, M. S. Sarandy

AI总结:

研究开放系统中ergotropy的动力学,建立环境诱导功与ergotropy的解析关系,并揭示其能量转移极限。

摘要:

我们研究了开放系统在马尔可夫和非马尔可夫演化下ergotropy(可提取功)的动力学。在此情景中,我们首先用能量和相干性来表述任意量子比特态的ergotropy。因此,我们确定了由于系统-浴相互作用而导致的ergotropy冻结和ergotropy突然死亡的条件。为了在开放系统情景中将ergotropy用作以功的形式提取能量的资源,我们采用了基于熵的量子热力学表述。在这种方法中,功获得了一个额外的环境诱导分量,即使在哈密顿量恒定的情况下也可能存在。然后,我们建立了环境诱导功与ergotropy之间的解析关系,从而提供了环境诱导功在ergotropy变化方面的解释。特别是,通过环境诱导功进行的能量转移可以达到一个极限,该极限由量子动力学中初始和最终被动态之间跃迁的能量成本所决定。我们针对在非耗散和耗散量子过程下演化的量子比特态说明了这些结果。

英文摘要:

We investigate the dynamics of ergotropy in open systems under Markovian and non-Markovian evolutions. In this scenario, we begin by formulating the ergotropy of an arbitrary qubit state in terms of energy and coherence. Thus, we determine the conditions for ergotropy freezing and ergotropy sudden death as a consequence of the system-bath interaction. In order to use ergotropy as a resource for energy extraction in the form of work in an open-system scenario, we adopt the entropy-based formulation of quantum thermodynamics. In this approach, the work gains an additional environment-induced component, which may be present even for constant Hamiltonians. We then establish an analytical relationship between the environment-induced work and ergotropy, providing an interpretation of environment-induced work in terms of variation of ergotropy. In particular, energy transfer by environment-induced work can be performed up to a limit, which is governed by the energy cost to transit between the initial and final passive states of the quantum dynamics. We illustrate these results for qubit states evolving under non-dissipative and dissipative quantum processes.

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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