Frequency-multiplexed Hong-Ou-Mandel interference
Frequency-multiplexed Hong-Ou-Mandel interference
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DOI：
10.1103/physreva.107.032608
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发表时间：
2023-03
影响因子：
2.9
通讯作者：
Mayuka Ichihara;Daisuke Yoshida;F. Hong;T. Horikiri
中科院分区：
文献类型：
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作者：
Mayuka Ichihara;Daisuke Yoshida;F. Hong;T. Horikiri
实现长距离量子通信所需的量子中继器需要产生分布在基本链路之间的量子纠缠。这些纠缠必须通过贝尔态测量在量子中继器之间交换。本研究的目的是通过频率复用Bell态的测量来提高纠缠的产生率。作为频率复用Bell态测量的第一步，利用在离子掺杂Y2SiO5晶体中制备的原子频率梳，利用弱相干态将三个频率模映射到时间模，并通过符合探测在每个频率模中观察到Hong-Ou-Mandel干涉，这是对两个输入不可分辨性的度量.所有模式的可见度为40%-42%（理论上高达50%）。此外，我们表明，避免了不同模式的混合。目前的结果与频率选择性贝尔态测量有关，因此与频率复用量子中继器有关。
The implementation of quantum repeaters needed for long-distance quantum communication requires the generation of quantum entanglement distributed among the elementary links. These entanglements must be swapped among the quantum repeaters through Bell-state measurements. This study aims to improve the entanglement generation rate by frequency multiplexing the Bell-state measurements. As a preliminary step of the frequency-multiplexed Bell-state measurements, three frequency modes are mapped to a temporal mode by an atomic frequency comb prepared in $\mathrm{Pr^{3+}}$ ion-doped $\mathrm{Y_2SiO_5}$ crystals using a weak coherent state, and Hong-Ou-Mandel interference, which is a measure of the indistinguishability of two inputs, is observed in each frequency mode by coincidence detection. The visibility for all the modes was 40%-42% (theoretically up to 50%). Furthermore, we show that a mixture of different modes is avoided. The present results are connected to frequency-selective Bell-state measurements and therefore frequency-multiplexed quantum repeaters.