Biphoton spectral quantum interference for information processing and delay metrology
Biphoton spectral quantum interference for information processing and delay metrology
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DOI：
10.1117/12.2656881
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
Suparna Seshadri;Hsuan-Hao Lu;J. Lukens;A. Weiner
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文献类型：
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作者：
Suparna Seshadri;Hsuan-Hao Lu;J. Lukens;A. Weiner
宽带时间-能量纠缠光子具有与精确延迟测量的潜力很强的时间相关性，但以前的工作只利用了飞行时间信息，最终受到时间标记电子设备的检测抖动和分辨率的限制。首先，我们的工作将基于纠缠的非局域延迟测量从传统的飞行时间测量推向了一种新的方向双光子干涉测量方法，其灵敏度与探测分辨率无关。接下来，我们利用一种新的可重构的装置，通过连续使用单谱线泵浦和双谱线泵浦，能够在Bell态之间切换，从而展示了频域编码的Bell态对双光子延迟之和和差的选择性灵敏度。
Broadband time-energy entangled photons feature strong temporal correlations with potential for precision delay metrology, but previous work has leveraged only time-of-flight information ultimately limited by the detection jitter and resolution of the time-tagging electronics. Firstly, our work pushes the entanglement-based nonlocal delay metrology from the conventional time-of-flight measurement to a new direction—two-photon interferometry with subpicosecond sensitivity independent of detection resolution. Next, we show the selective sensitivity of frequency-bin encoded Bell states to the sum and difference of biphoton-delays by using a novel reconfigurable setup capable of switching between the Bell states by successively employing single and dual spectral-line pumps.