Quantum communication for satellite-to-ground networks with partially entangled states

doi:10.1088/1674-1056/24/2/020304

中国物理B ›› 2015, Vol. 24 ›› Issue (2): 20304-020304.doi: 10.1088/1674-1056/24/2/020304

Quantum communication for satellite-to-ground networks with partially entangled states

陈娜, 权东晓, 裴昌幸, 杨宏

State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an 710071, China

收稿日期:2014-07-26 修回日期:2014-09-13 出版日期:2015-02-05 发布日期:2015-02-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61072067 and 61372076), the 111 Project (Grant No. B08038), the Fund from the State Key Laboratory of Integrated Services Networks (Grant No. ISN 1001004), and the Fundamental Research Funds for the Central Universities (Grant Nos. K5051301059 and K5051201021).

Quantum communication for satellite-to-ground networks with partially entangled states

Chen Na (陈娜), Quan Dong-Xiao (权东晓), Pei Chang-Xing (裴昌幸), Yang-Hong (杨宏)

State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an 710071, China

Received:2014-07-26 Revised:2014-09-13 Online:2015-02-05 Published:2015-02-05
Contact: Chen Na E-mail:na_chen@outlook.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61072067 and 61372076), the 111 Project (Grant No. B08038), the Fund from the State Key Laboratory of Integrated Services Networks (Grant No. ISN 1001004), and the Fundamental Research Funds for the Central Universities (Grant Nos. K5051301059 and K5051201021).

摘要/Abstract

摘要： To realize practical wide-area quantum communication, a satellite-to-ground network with partially entangled states is developed in this paper. For efficiency and security reasons, the existing method of quantum communication in distributed wireless quantum networks with partially entangled states cannot be applied directly to the proposed quantum network. Based on this point, an efficient and secure quantum communication scheme with partially entangled states is presented. In our scheme, the source node performs teleportation only after an end-to-end entangled state has been established by entanglement swapping with partially entangled states. Thus, the security of quantum communication is guaranteed. The destination node recovers the transmitted quantum bit with the help of an auxiliary quantum bit and specially defined unitary matrices. Detailed calculations and simulation analyses show that the probability of successfully transferring a quantum bit in the presented scheme is high. In addition, the auxiliary quantum bit provides a heralded mechanism for successful communication. Based on the critical components that are presented in this article an efficient, secure, and practical wide-area quantum communication can be achieved.

关键词: satellite-to-ground quantum communication network, partially entangled states, entanglement swapping, quantum teleportation

Abstract: To realize practical wide-area quantum communication, a satellite-to-ground network with partially entangled states is developed in this paper. For efficiency and security reasons, the existing method of quantum communication in distributed wireless quantum networks with partially entangled states cannot be applied directly to the proposed quantum network. Based on this point, an efficient and secure quantum communication scheme with partially entangled states is presented. In our scheme, the source node performs teleportation only after an end-to-end entangled state has been established by entanglement swapping with partially entangled states. Thus, the security of quantum communication is guaranteed. The destination node recovers the transmitted quantum bit with the help of an auxiliary quantum bit and specially defined unitary matrices. Detailed calculations and simulation analyses show that the probability of successfully transferring a quantum bit in the presented scheme is high. In addition, the auxiliary quantum bit provides a heralded mechanism for successful communication. Based on the critical components that are presented in this article an efficient, secure, and practical wide-area quantum communication can be achieved.

Key words: satellite-to-ground quantum communication network, partially entangled states, entanglement swapping, quantum teleportation

中图分类号: (Quantum communication)

03.67.Hk

42.50.Ex (Optical implementations of quantum information processing and transfer)

陈娜, 权东晓, 裴昌幸, 杨宏. Quantum communication for satellite-to-ground networks with partially entangled states[J]. 中国物理B, 2015, 24(2): 20304-020304.

Chen Na (陈娜), Quan Dong-Xiao (权东晓), Pei Chang-Xing (裴昌幸), Yang-Hong (杨宏). Quantum communication for satellite-to-ground networks with partially entangled states[J]. Chin. Phys. B, 2015, 24(2): 20304-020304.

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Quantum communication for satellite-to-ground networks with partially entangled states

Quantum communication for satellite-to-ground networks with partially entangled states

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