双光子量子脉冲对量子电池的充电
Charging of a Quantum Battery by a Two-Photon Quantum Pulse
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中文总结 AI 辅助
该研究针对谐振子量子电池，通过理论分析推导了双光子时间模式及充电条件，发现时间模式结构与响应匹配而非仅非可分性决定充电性能。
中文摘要 AI 辅助
我们研究了由传播的双光子量子脉冲通过二能级系统充电器耦合的谐振子量子电池的充电过程。激发数守恒将动力学简化为第一和第二激发区的序列响应，其有效非厄米生成元呈现两个例外点，区分过阻尼、混合和欠阻尼三种状态。我们推导了理想共振单通道模型中实现完美充电的精确全充电振幅及响应匹配的双光子时间模式。对于实验可及的高斯脉冲，适度的时间反关联或有限的光子延迟可增强充电效果，而正相关通常会抑制充电。具有相同施密特数的态却表现出不同的充电效率，表明时间模式结构与响应匹配而非仅非可分性决定充电性能。
英文摘要
We investigate the charging of a harmonic-oscillator quantum battery by a propagating two-photon quantum pulse coupled through a two-level-system charger. Excitation-number conservation reduces the dynamics to a sequential response of the first and second excitation sectors, whose effective non-Hermitian generators exhibit two exceptional points separating overdamped, mixed, and underdamped regimes. We derive the exact full-charging amplitude and the response-matched two-photon temporal mode that achieves perfect charging in the ideal resonant single-channel model. For experimentally accessible Gaussian pulses, moderate temporal anticorrelation or a finite photon delay can enhance charging, whereas positive correlations generally suppress it. States with equal Schmidt number can nevertheless show different charging efficiencies, demonstrating that temporal-mode structure and response matching, rather than nonseparability alone, determine charging performance.
