淡江大學機構典藏:Item 987654321/120593
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    题名: Direct and efficient verification of entanglement between two multimode–multiphoton systems
    作者: Kiyohara, Takayuki;Yamashiro, Naoki;Okamoto, Ryo;Araki, Hirotaka;Wu, Jun-Yi;Hofmann, Holger F.;Takeuchi, Shigeki
    日期: 2020-10-29
    上传时间: 2021-04-22 12:10:26 (UTC+8)
    摘要: Linear-optic photonic networks with multiple single-photon inputs are attracting attention due to their great potential for quantum computation, quantum communication, and quantum sensing. They are also essential for verifying quantum advantages via boson sampling schemes. The quantum coherence of generated multimode–multiphoton states is crucial for various applications. However, the coherence is invisible in the normally obtained photon number distributions, which strictly limits the efficiency of entanglement verification between multimode–multiphoton systems since the required resources for quantum state tomography increase exponentially as the number of photons/modes increases. In this paper, we report the experimental demonstration of direct and efficient verification of entanglement between two multimode–multiphoton systems (one photon in three modes and two photons in three modes) using just two sets of classical correlation tables with and without a discrete Fourier transformation of the optical modes, clearly demonstrating a dramatic reduction in the resources required for entanglement verification. Our experimental demonstration paves the way to understanding the coherence and entanglement of multi-partite systems, not only for photons but for other quantum resources with high-dimensional degrees of freedom.
    關聯: Optica 7(11), pp.1517-1523
    DOI: 10.1364/OPTICA.397943
    显示于类别:[物理學系暨研究所] 期刊論文

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