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arXiv 0902.2743quant-ph
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光相干态量子复用

Quantum multiplexing with optical coherent states

Juan Carlos Garcia-Escartin, Pedro Chamorro-Posada

摘要:

本文提出了一种新的基于光相干态的量子多址接入技术。将多个相干态光量子比特的信息组合成一个量子比特,它是几乎正交相干态的叠加。原始信息在量子复用器(QMUX)的帮助下被编码到新的希尔伯特空间中,然后在另一端用量子解复用器(QDEMUX)恢复。我们介绍了完成相干态量子计算模型的光学工具,并给出了所需的电路。所提出的系统可以允许多个用户超过最佳限制的成本的降级的传输数据。在这方面和其他一些方面,它可以被视为经典码分多址技术的量子模拟。

英文摘要:

In this paper, we propose a novel quantum multiple access technique based on optical coherent states. The information of several coherent state optical qubits is combined into a single qudit, which is the superposition of almost orthogonal coherent states. The original information is encoded into a new Hilbert space with the help of a quantum multiplexer (QMUX) and then recovered at the other end with a quantum demultiplexer (QDEMUX). We introduce the optical tools that complete the coherence state quantum computation model and give the desired circuits. The proposed system can admit a number of users above the optimal limit at the cost of a degradation of the transmitted data. In this and some other aspects, it can be regarded as a quantum analogue of classical Code Division Multiple Access techniques.

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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