Quantum Energy Lines and the Optimal Output Ergotropy Problem,Physical Review Letters

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Quantum Energy Lines and the Optimal Output Ergotropy Problem
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-11-19 , DOI: 10.1103/physrevlett.127.210601
Salvatore Tirone ₁ , Raffaele Salvia ₁ , Vittorio Giovannetti ₂

Affiliation

We study the transferring of useful energy (work) along a transmission line that allows for partial preservation of quantum coherence. As a figure of merit we adopt the maximum values that ergotropy, total ergotropy, and nonequilibrium free energy attain at the output of the line for an assigned input energy threshold. For phase-invariant bosonic Gaussian channel (BGC) models, we show that coherent inputs are optimal. For (one-mode) not phase-invariant BGCs we solve the optimization problem under the extra restriction of Gaussian input signals.

中文翻译：

量子能量线和最优输出 Ergotropy 问题

我们研究沿传输线传输有用能量（功）的过程，该传输线允许部分保持量子相干性。作为品质因数，我们采用在指定输入能量阈值的线的输出处获得的麦角效应、总麦角效应和非平衡自由能的最大值。对于相位不变的玻色高斯通道 (BGC) 模型，我们表明相干输入是最佳的。对于（单模）非相位不变的 BGC，我们在高斯输入信号的额外限制下解决了优化问题。

更新日期：2021-11-20

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