Transceiver Designs Approaching the Entanglement-Assisted Communication Capacity

被引:1
|
作者
Cox, Ali [1 ]
Zhuang, Quntao [2 ]
Gagatsos, Christos N. [3 ]
Bash, Boulat [1 ,3 ]
Guha, Saikat [1 ,3 ]
机构
[1] Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA
[2] Univ Southern Calif, Viterbi Sch Engn, Los Angeles, CA 90089 USA
[3] Univ Arizona, Dept Elect & Comp Engn, Tucson, AZ 85721 USA
基金
美国国家科学基金会;
关键词
QUANTUM CHANNEL; RATES;
D O I
10.1103/PhysRevApplied.19.064015
中图分类号
O59 [应用物理学];
学科分类号
摘要
Preshared entanglement can significantly boost communication rates in the high thermal-noise and low -brightness transmitter regime. In this regime, for a lossy bosonic channel with additive thermal noise, the ratio between the entanglement-assisted capacity and the Holevo capacity-the maximum reliable communication rate permitted by quantum mechanics without any preshared entanglement-scales as log(1/ over bar NS), where the mean transmitted photon number per mode, e.g., distributed by the quantum internet or a satellite-assisted quantum link, promises to significantly improve low-power radio-frequency communications. In this paper, we propose a pair of structured quan-tum transceiver designs that leverage continuous-variable preshared entanglement (generated, e.g., from a down-conversion source), binary phase modulation, and non-Gaussian joint detection over a codeword block, to achieve this scaling law of capacity enhancement. Furthermore, we describe a modification to the aforesaid receiver using a frontend that uses sum-frequency generation sandwiched with dynamically programmable in-line two-mode squeezers, and a receiver backend that takes full advantage of the out-put of the receiver's frontend by employing a nondestructive multimode vacuum-or-not measurement to achieve the entanglement-assisted classical communication capacity. over bar NS ⠂ 1. Thus, preshared entanglement,
引用
收藏
页数:35
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