Generation and detection of discrete-variable multipartite entanglement with multirail encoding in linear-optics networks

doi:10.1103/PhysRevA.106.032437

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/124307

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题名:	Generation and detection of discrete-variable multipartite entanglement with multirail encoding in linear-optics networks
作者:	Jun-Yi Wu
关键词:	Entanglement detection;Quantum entanglement;Quantum optics
日期:	2022-09-30
上传时间:	2023-07-27 12:05:11 (UTC+8)
摘要:	A linear-optics network is a multimode interferometer system, where indistinguishable photon inputs can create nonclassical interference that cannot be simulated with classical computers. Such nonclassical interference implies the existence of entanglement among its subsystems if we divide its modes into different parties. Entanglement in such systems is naturally encoded in multirail (multimode) quantum registers. For bipartite entanglement, a generation and detection scheme with multirail encoding was theoretically proposed [Wu and Hofmann, New J. Phys. 19, 103032 (2017)] and experimentally realized [Kiyohara et al., Optica 7, 1517 (2020)]. In this paper, we will take a step further to establish a theory for the detection of multirail-encoded discrete-variable genuine multipartite entanglement (GME) in fixed local-photon-number subspaces of linear-optics networks. We also propose a scheme for GME generation with both discrete-variable (single photons) and continuous-variable (squeezed states) light sources. This scheme allows us to reveal the discrete-variable GME in continuous-variable systems. The effect of photon losses is also numerically analyzed for the generation scheme based on continuous-variable inputs.
關聯:	Physical Review A 106(3), 032437
DOI:	10.1103/PhysRevA.106.032437
显示于类别:	[物理學系暨研究所] 期刊論文

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