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arXiv 2008.00856quant-ph
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基于多端口的隐形传态--大量量子信息的传输

Multiport based teleportation -- transmission of a large amount of quantum information

Piotr Kopszak, Marek Mozrzymas, Michał Studziński, Michał Horodecki

摘要:

分析了一次性传输多个未知量子态或一个复合系统的问题。我们推导出一个下界的性能,这样的过程中,测量的纠缠保真度。所得到的界限是有效的可计算的,并优于显式值的纠缠保真度计算的预先存在的变种的基于端口的协议,允许远更大量的量子信息的隐形传态。文中还讨论了与精确公式的比较和概率格式的相似分析。特别是,我们提出了封闭形式的表达式的纠缠保真度和成功的概率方案中的量子比特的情况下,在图片的自旋角动量。

英文摘要:

We analyse the problem of transmitting a number of unknown quantum states or one composite system in one go. We derive a lower bound on the performance of such process, measured in the entanglement fidelity. The obtained bound is effectively computable and outperforms the explicit values of the entanglement fidelity calculated for the pre-existing variants of the port-based protocols, allowing for teleportation of a much larger amount of quantum information. The comparison with the exact formulas and similar analysis for the probabilistic scheme is also discussed. In particular, we present the closed-form expressions for the entanglement fidelity and for the probability of success in the probabilistic scheme in the qubit case in the picture of the spin angular momentum.

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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