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物理学报. 2009, 58(10): 6779-6785.
doi: 10.7498/aps.58.6779.
多输入多输出量子密钥分发信道容量研究
- 收稿日期: 2008-09-17
- 修回日期: 2008-12-11
- 刊出日期: 2009-10-20
English Abstract
Capacity of multiple-input-multiple-output quantum key distribution channels
- Received Date:
17 September 2008
- Accepted Date:
11 December 2008
- Published Online:
20 October 2009
Abstract: Quantum safety communications is a process of quantum key distribution （QKD）. Current QKD technology restricts transmission to a low bit rate. To improve the QKD bit rate and develope high rate and large capacity, we propose a multiple-input-multiple-output（MIMO） quantum key distribution system. The Wigner operator of multi-photon entangled states in MIMO quantum key distribution channel is presented. As a result, the Wigner function of multi-photon double-model squeezed entangled sates and MIMO quantum key distribution channel capacity are also obtained, which will provide theoretical support and technical basis for developing robust space-time processing algorithm of MIMO quantum safety communications and designing optimum high performance system of MIMO quantum key distribution.
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