Quantum cryptography over non-Markovian channels

被引:25
作者
Thapliyal, Kishore [1 ]
Pathak, Anirban [1 ]
Banerjee, Subhashish [2 ]
机构
[1] Jaypee Inst Informat Technol, A 10,Sect 62, Noida 201307, UP, India
[2] Indian Inst Technol Jodhpur, Jodhpur 342011, Rajasthan, India
关键词
Non-Markovian channel; Depolarizing channel; Quantum cryptography; Secure quantum communication; EFFICIENT PROTOCOLS; NOISY ENVIRONMENT; BELL STATES; COMMUNICATION; ENTANGLEMENT; DECOHERENCE; INFORMATION; DYNAMICS; MEMORY;
D O I
10.1007/s11128-017-1567-1
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A three-party scheme for secure quantum communication, namely controlled quantum dialogue ( CQD), is analyzed under the influence of non-Markovian channels. By comparing with the corresponding Markovian cases, it is seen that the average fidelity can be maintained for relatively longer periods of time. Interestingly, a number of facets of quantum cryptography, such as quantum secure direct communication, deterministic secure quantum communication and their controlled counterparts, quantum dialogue, quantum key distribution, quantum key agreement, can be reduced from the CQD scheme. Therefore, the CQD scheme is analyzed under the influence of damping, dephasing and depolarizing non-Markovian channels, and subsequently, the effect of these non-Markovian channels on the other schemes of secure quantum communication is deduced from the results obtained for CQD. The damped non-Markovian channel causes a periodic revival in the fidelity, while fidelity is observed to be sustained under the influence of the dephasing non-Markovian channel.
引用
收藏
页数:21
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