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引用次数: 0
摘要
摘要量子状态共享是量子信息中的一个重要协议,当部分信息丢失时,它可以实现安全的状态分配和重建。在(k,n)阈值量子态共享中,秘密状态被编码为n个共享,然后分发给n个参与者。秘密状态可以由任意k个参与者(k > n / 2) ,而其他玩家一无所获。在连续变量系统中,量子态共享的实现需要前馈技术,该技术涉及光电转换和电光转换。这些转换限制了量子态共享的带宽。在这里,为了避免光电转换和电光转换,我们实验证明了(2,3)阈值确定性全光量子态共享。采用基于四波混频过程的低噪声相位不敏感放大器来代替前馈技术。我们通过实验证明,三个参与者中的任何两个都可以合作实现秘密状态的重建,而其他参与者则无法获得任何信息。我们的结果为实现任意(k,n)阈值确定性全光量子态共享提供了一个全光平台,并为构建全光宽带量子网络铺平了道路。
Abstract. Quantum state sharing, an important protocol in quantum information, can enable secure state distribution and reconstruction when part of the information is lost. In (k, n) threshold quantum state sharing, the secret state is encoded into n shares and then distributed to n players. The secret state can be reconstructed by any k players (k > n / 2), while the rest of the players get nothing. In the continuous variable regime, the implementation of quantum state sharing needs the feedforward technique, which involves optic-electro and electro-optic conversions. These conversions limit the bandwidth of the quantum state sharing. Here, to avoid the optic-electro and electro-optic conversions, we experimentally demonstrate (2, 3) threshold deterministic all-optical quantum state sharing. A low-noise phase-insensitive amplifier based on the four-wave mixing process is utilized to replace the feedforward technique. We experimentally demonstrate that any two of three players can cooperate to implement the reconstruction of the secret state, while the rest of the players cannot get any information. Our results provide an all-optical platform to implement arbitrary (k, n) threshold deterministic all-optical quantum state sharing and pave the way to construct the all-optical broadband quantum network.
期刊介绍:
Advanced Photonics is a highly selective, open-access, international journal that publishes innovative research in all areas of optics and photonics, including fundamental and applied research. The journal publishes top-quality original papers, letters, and review articles, reflecting significant advances and breakthroughs in theoretical and experimental research and novel applications with considerable potential.
The journal seeks high-quality, high-impact articles across the entire spectrum of optics, photonics, and related fields with specific emphasis on the following acceptance criteria:
-New concepts in terms of fundamental research with great impact and significance
-State-of-the-art technologies in terms of novel methods for important applications
-Reviews of recent major advances and discoveries and state-of-the-art benchmarking.
The journal also publishes news and commentaries highlighting scientific and technological discoveries, breakthroughs, and achievements in optics, photonics, and related fields.