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arXiv 2212.01092quant-ph
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确定性联合远程态制备与非最大纠缠信道

Deterministic joint remote state preparation with a non-maximally entangled channel

Xuanxuan Xin, Shiwen He, Yongxing Li, Chong Li

AI总结:

针对最大纠缠信道退化问题,提出直接利用非最大纠缠态并借助辅助量子比特实现确定性联合远程态制备的方案,成功概率保持100%,并推广至高维情形。

摘要:

理想的确定性量子通信任务需要最大纠缠信道。然而,由于各种退相干机制,最大纠缠信道不可避免地退化为非最大纠缠信道,严重降低了量子通信的性能。我们未采用传统的纠缠纯化或蒸馏来重建最大纠缠信道,而是直接利用退化的非最大纠缠态设计了一种新颖的确定性联合远程态制备方案。借助辅助量子比特,我们设计了一种通过非最大超纠缠信道确定性联合远程制备二维量子态的协议。随后,我们将其推广以忠实地制备高维量子态。无论共享纠缠有多弱,只要存在纠缠,通信的成功概率就保持在100%。这项研究为构建实用量子通信网络提供了一种思路。

英文摘要:

Ideal deterministic quantum communication tasks require maximally entangled channels. The reality is that the maximally entangled channel is inevitably degraded to a non-maximally entangled one because of various decoherence mechanisms, seriously deteriorating the performance of quantum communication. Instead of adopting traditional entanglement purification or distillation to rebuild maximally entangled channels, we have designed a novel deterministic joint remote state preparation scheme using the degenerated non-maximally entangled state directly. A protocol for deterministic joint remote preparation of a two-dimensional quantum state via a non-maximally hyperentangled quantum channel has been devised with the help of auxiliary qudits. Then we generalize it to prepare a high-dimensional quantum state faithfully. No matter how weak the shared entanglement is, the success probability of communication is maintained at 100% as soon as it exists. This investigation provides an ideology for the construction of practical quantum communication networks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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