用于探测真空非线性的经典与非经典光子态
Classical versus non-classical photon states for detecting vacuum non-linearity
AI总结：
该研究对比经典与非经典光子态，提出注入压缩态等非经典光子态可改进QED真空非线性探测方案，显著提升探测能力。
AI中文摘要：
量子电动力学（QED）预言真空应表现为非线性介质。针对验证这一基础预言的诸多方案，其信号包含特定模式（由偏振σ和波矢k确定）的一个或多个光子，若无QED真空非线性则该模式为空。本文考虑通过在该模式中注入经典或非经典（如压缩态）光子态替代初始真空态来改进这些方案，发现探测能力可显著提升。
英文摘要：
Quantum electrodynamics (QED) predicts that the vacuum should behave as a non-linear medium. For many schemes aimed at verifying this fundamental prediction, the signal consists of one or more photons in a certain mode (determined by polarization $σ$ and wave-number $\boldsymbol{k}$) which would be empty in the absence of a QED vacuum non-linearity. Here we consider modifying these schemes by sending in a classical or non-classical (e.g., squeezed) photon state instead of the initial vacuum state in that mode. We find that the detectability can be improved significantly.
