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arXiv 2201.13333quant-phphysics.optics
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用循环积分干涉仪量化n光子不可逆性

Quantifying n-photon indistinguishability with a cyclic integrated interferometer

Mathias Pont, Riccardo Albiero, Sarah E. Thomas, Nicolò Spagnolo, Francesco Ceccarelli, Giacomo Corrielli, Alexandre Brieussel, Niccolo Somaschi, Hêlio Huet, Ab… 展开作者

Mathias Pont, Riccardo Albiero, Sarah E. Thomas, Nicolò Spagnolo, Francesco Ceccarelli, Giacomo Corrielli, Alexandre Brieussel, Niccolo Somaschi, Hêlio Huet, Abdelmounaim Harouri, Aristide Lemaître, Isabelle Sagnes, Nadia Belabas, Fabio Sciarrino, Roberto Osellame, Pascale Senellart, Andrea Crespi

摘要:

我们报告了一种通用的方法来衡量真正的不可分割的n-光子-一个关键的参数,决定了光学量子计算的准确性。我们的方法依赖于一个低深度的循环多端口干涉仪与N = 2n模式,导致量子干涉条纹的可见性是一个真正的n-光子不可逆性的直接测量。我们用飞秒激光微加工和量子点单光子源的四个光子制作了一个8模集成干涉仪,实验证明了这种技术。我们测量的四光子不可逆性高达0.81 $\pm$ 0.03。当我们有意地改变光子成对不可逆性时,该值会减小。低深度和低损耗的多端口干涉仪设计提供了一个有效的和可扩展的路径,以评估真正的不可分割的资源状态的光子数增加。

英文摘要:

We report on a universal method to measure the genuine indistinguishability of n-photons - a crucial parameter that determines the accuracy of optical quantum computing. Our approach relies on a low-depth cyclic multiport interferometer with N = 2n modes, leading to a quantum interference fringe whose visibility is a direct measurement of the genuine n-photon indistinguishability. We experimentally demonstrate this technique for a 8-mode integrated interferometer fabricated using femtosecond laser micromachining and four photons from a quantum dot single-photon source. We measure a four-photon indistinguishability up to 0.81$\pm$0.03. This value decreases as we intentionally alter the photon pairwise indistinguishability. The low-depth and low-loss multiport interferometer design provides an efficient and scalable path to evaluate the genuine indistinguishability of resource states of increasing photon number.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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