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arXiv 2104.11255quant-phmath-phmath.MP
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量子能量线与最优输出各向同性问题

Quantum Energy Lines and the optimal output ergotropy problem

Salvatore Tirone, Raffaele Salvia, Vittorio Giovannetti

摘要:

我们研究了传输线上的有用能量(功)的传递,该传输线允许部分保持量子相干性。作为一个品质因数,我们采用的最大值,各向同性,总各向同性,和非平衡自由能达到在指定的输入能量阈值的线的输出。对于相位不变的玻色高斯信道(BGC)模型,我们证明了相干输入是最优的。对于(单模)非相位不变的BGC,我们解决了高斯输入信号的额外限制下的优化问题。

英文摘要:

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 non-equilibrium free-energy attain at the output of the line for an assigned input energy threshold. For Phase-Invariant Bosonic Gaussian Channels (BGCs) 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.

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