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Experimental post-selection loophole-free time-bin and energy-time nonlocality with integrated photonics
Optica ( IF 8.4 ) Pub Date : 2024-04-12 , DOI: 10.1364/optica.499247
Francesco B. L. Santagiustina 1 , Costantino Agnesi 1 , Alvaro Alarcón 2 , Adán Cabello 3 , Guilherme B. Xavier 2 , Paolo Villoresi 1 , Giuseppe Vallone 1
Affiliation  

Time-bin (TB) and energy-time (ET) entanglements are crucial resources for long-distance quantum information processing. However, their standard implementations suffer from the so-called post-selection loophole that allows for classical simulation and thus prevents quantum advantage. The post-selection loophole has been addressed in proof-of-principle experiments. An open problem though is to close it in real-life applications based on integrated technologies. This is especially important since, so far, all integrated sources of TB and ET entanglements suffer from the post-selection loophole. Here, we report post-selection loophole-free certification of TB or ET entanglement in integrated technologies, by implementing in a silicon nitride chip the “hug” scheme [Phys. Rev. Lett. 102, 040401 (2009) [CrossRef] ] and certifying genuine TB entanglement through the violation of a Bell inequality.

中文翻译:

集成光子学的实验后选择无漏洞时间仓和能量时间非局域性

时间仓(TB)和能量时间(ET)纠缠是长距离量子信息处理的关键资源。然而,它们的标准实现存在所谓的后选择漏洞,该漏洞允许经典模拟,从而阻止量子优势。选择后的漏洞已在原理验证实验中得到解决。然而,一个悬而未决的问题是在基于集成技术的现实应用中关闭它。这一点尤其重要,因为到目前为止,所有 TB 和 ET 纠缠的综合来源都受到后选择漏洞的影响。在这里,我们通过在氮化硅芯片中实施“拥抱”方案,报告了集成技术中 TB 或 ET 纠缠的选择后无漏洞认证。莱特牧师。102 , 040401 (2009) [CrossRef] ] 并通过违反贝尔不等式证明真正的结核病缠结。
更新日期:2024-04-12
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