论文标题

测量统计诱导的纠缠熵与Hong-Ou-Mandel干涉仪

Measuring statistics-induced entanglement entropy with a Hong-Ou-Mandel interferometer

论文作者

Zhang, Gu, Hong, Changki, Alkalay, Tomer, Umansky, Vladimir, Heiblum, Moty, Gornyi, Igor V., Gefen, Yuval

论文摘要

尽管在量子计算和量子信息中无处不在,但普遍适用的量子纠缠定义仍然难以捉摸。当纠缠与其他关键主题(例如量子干扰和量子统计数据)相关联时,挑战将进一步强调。在这里,我们介绍了两个新型图案,这些图案描述了纠缠和量子统计的相互作用:“纠缠指针”和“统计诱导的纠缠熵”。两者提供了统计诱导的纠缠的定量描述:(i)仅在量子统计强调的量子纠缠的存在下,它们才有有限; (ii)它们的显式形式取决于颗粒的量子统计(例如,费米子,玻色子,Anyons)。我们通过在整数量子厅平台中使用了由两个高稀释的电子梁喂养的电子hong-ou-曼德尔干涉仪,通过实验实现了这些想法。对散射梁的当前波动进行自动相关和互相关的测量(“碰撞”后,我们通过实验访问纠缠指针和统计诱导的纠缠熵来量化统计诱导的纠缠。我们的理论和实验方法铺平了研究各种相关平台中纠缠的方式,例如那些涉及任何涉及任何人的阿贝利亚和非阿贝尔国家的方法。

Despite its ubiquity in quantum computation and quantum information, a universally applicable definition of quantum entanglement remains elusive. The challenge is further accentuated when entanglement is associated with other key themes, e.g., quantum interference and quantum statistics. Here, we introduce two novel motifs that characterize the interplay of entanglement and quantum statistics: an 'entanglement pointer' and a 'statistics-induced entanglement entropy'. The two provide a quantitative description of the statistics-induced entanglement: (i) they are finite only in the presence of quantum entanglement underlined by quantum statistics; (ii) their explicit form depends on the quantum statistics of the particles (e.g., fermions, bosons, anyons). We have experimentally implemented these ideas by employing an electronic Hong-Ou-Mandel interferometer fed by two highly diluted electron beams in an integer quantum Hall platform. Performing measurements of auto-correlation and cross-correlation of current fluctuations of the scattered beams (following 'collisions'), we quantify the statistics-induced entanglement by experimentally accessing the entanglement pointer and the statistics-induced entanglement entropy. Our theoretical and experimental approaches pave the way to study entanglement in various correlated platforms, e.g., those involving anyonic Abelian and non-Abelian states.

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