Experimental feasibility of molecular two-photon absorption with isolated time-frequency-entangled photon pairs
Experimental feasibility of molecular two-photon absorption with isolated time-frequency-entangled photon pairs
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DOI：
10.1103/physrevresearch.3.033154
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发表时间：
2021-08-13
影响因子：
4.2
通讯作者：
Raymer, Michael G.
中科院分区：
文献类型：
--
作者：
Landes, Tiemo;Allgaier, Markus;Raymer, Michael G.
纠缠光子对有望为双光子吸收光谱带来巨大的量子优势。然而，最近的工作对先前报道的双光子吸收的量子增强幅度提出了挑战。我们提出了一种由孤立光子对驱动的分子吸收测量方法，使用非线性光学晶体中的和频生成作为校准装置。因此，我们建立了罗丹明 6G 中纠缠双光子吸收增强的上限，该上限远低于之前报道的值。
Entangled photon pairs have promised to deliver a substantial quantum advantage for two-photon absorption spectroscopy. However, recent work has challenged the previously reported magnitude of quantum enhancement in two-photon absorption. We present a measurement of molecular absorption driven by isolated photon pairs using sum-frequency generation in a nonlinear optical crystal as a calibration device. We thereby establish an upper bound on the enhancement for entangled two-photon absorption in Rhodamine 6G, which lies well below previously reported values.