Wang Yu, Hu Ming-Liang
School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.
School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.
Entropy (Basel). 2022 Aug 12;24(8):1114. doi: 10.3390/e24081114.
The effect of a reservoir on quantum communication depends on its spectral density. The efficiency of quantum teleportation and dense coding is explored when each one of the channel qubits is coupled simultaneously to multiple bosonic reservoirs. It is shown that the non-Markovianity triggered by increasing the reservoir number can induce revivals of quantum advantages of the two protocols after their disappearance. However, the backflow of information to the system that signifies non-Markovianity does not always induce immediate revivals of the quantum advantages. There may be a delayed effect for some initial states, and only as the backflow of information accumulates to a certain extent can the revivals of quantum advantages be triggered.
一个量子存储库对量子通信的影响取决于其谱密度。当每个信道量子比特同时与多个玻色子存储库耦合时，研究了量子隐形传态和密集编码的效率。结果表明，增加存储库数量所引发的非马尔可夫性能够在这两种协议的量子优势消失后使其复苏。然而，标志着非马尔可夫性的信息回流到系统并不总是能立即引发量子优势的复苏。对于某些初始状态可能存在延迟效应，只有当信息回流积累到一定程度时，才能触发量子优势的复苏。
