混合光-微波交叉腔中利用非马尔可夫性增强反聚束效应
Antibunching Enhancement via Non-Markovianity in a Hybrid Optical-Microwave Cross-Cavity
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中文总结 AI 辅助
该研究在混合光-微波交叉腔中，利用Er³⁺:Y₂SiO₅晶体引入非马尔可夫性，通过结构化库工程抑制二阶关联函数至10⁻⁷量级，实现高纯度反聚束光产生，为量子光源开发提供新途径。
中文摘要 AI 辅助
非常规光子阻塞（UPB）提供了一种无需强非线性耦合即可通过量子干涉产生反聚束光的诱人途径。在传统马尔可夫系统中，不可逆耗散会逐渐破坏相位相干性，甚至限制可实现的单光子纯度。本文提出一种在微波腔中引入非马尔可夫效应的方案，该微波腔包含嵌入混合光-微波系统中的Er³⁺:Y₂SiO₅晶体。基于无时间卷积的非马尔可夫框架，我们推导了弱耦合区域内的时间相关非马尔可夫衰减率和重整化微波驱动。结果表明，由于环境信息的回流增强了光子阻塞，二阶关联函数被显著抑制，甚至达到10⁻⁷量级。此外，这种结构化库工程不仅提供了额外的自由度，还可通过光失谐进一步优化阻塞效果。重要的是，延迟的二阶关联呈现出展宽的反聚束轮廓，从而放宽了单光子同步的时序要求。我们的结果证明，环境非马尔可夫性可从退相干源转化为可控量子资源，为高纯度单光子产生开辟了新机遇。
英文摘要
Unconventional photon blockade (UPB) provides an attractive route for generating antibunched light through quantum interference without requiring strong nonlinear coupling. In conventional Markovian systems, irreversible dissipation progressively destroys the phase coherence, even limiting the achievable single-photon purity. Here we propose a scheme for imposing non-Markovian effects on a microwave cavity where a Er$^{3+}$:Y$_2$SiO$_5$ crystal loaded into a hybrid optical-microwave system. Based on the time-convolutionless non-Markovian framework, we derive the time-dependent non-Markovian decay rate and the renormalized microwave drive in the weak-coupling regime. We show that the second-order correlation function is significantly suppressed, even to the order of $10^{-7}$, since the backflow of environmental information enhances photon blocking. In addition, this structured reservoir engineering not only provides an additional degree of freedom, but also further optimizes the blockade via optical detuning. Importantly, the delayed second-order correlation exhibits a broadened antibunching profile, thereby relaxing the timing requirements for single-photon synchronization. Our results demonstrate that environmental non-Markovianity can be transformed from a source of decoherence into a controllable quantum resource, opening new opportunities for high-purity single-photon generation.
