Enhanced Superdense Coding over Correlated Amplitude Damping Channel
Quantum channels with correlated effects are realistic scenarios for the study of noisy quantum communication when the channels are consecutively used. In this paper, superdense coding is reexamined under a correlated amplitude damping (CAD) channel. Two techniques named as weak measurement and envi...
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doaj-18a4a08e3f134dfabe1042d964cd60b42020-11-25T01:17:03ZengMDPI AGEntropy1099-43002019-06-0121659810.3390/e21060598e21060598Enhanced Superdense Coding over Correlated Amplitude Damping ChannelYan-Ling Li0Dong-Mei Wei1Chuan-Jin Zu2Xing Xiao3School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaSchool of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaSchool of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaCollege of Physics and Electronic Information, Gannan Normal University, Ganzhou 341000, ChinaQuantum channels with correlated effects are realistic scenarios for the study of noisy quantum communication when the channels are consecutively used. In this paper, superdense coding is reexamined under a correlated amplitude damping (CAD) channel. Two techniques named as weak measurement and environment-assisted measurement are utilized to enhance the capacity of superdense coding. The results show that both of them enable us to battle against the CAD decoherence and improve the capacity with a certain probability. Remarkably, the scheme of environment-assisted measurement always outperforms the scheme of weak measurement in both improving the capacity and successful probability. These notable superiorities could be attributed to the fact that environment-assisted measurement can extract additional information from the environment and thus it performs much better.https://www.mdpi.com/1099-4300/21/6/598superdense codingcorrelated amplitude damping channelweak measurementenvironment-assisted measurement |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yan-Ling Li Dong-Mei Wei Chuan-Jin Zu Xing Xiao |
spellingShingle |
Yan-Ling Li Dong-Mei Wei Chuan-Jin Zu Xing Xiao Enhanced Superdense Coding over Correlated Amplitude Damping Channel Entropy superdense coding correlated amplitude damping channel weak measurement environment-assisted measurement |
author_facet |
Yan-Ling Li Dong-Mei Wei Chuan-Jin Zu Xing Xiao |
author_sort |
Yan-Ling Li |
title |
Enhanced Superdense Coding over Correlated Amplitude Damping Channel |
title_short |
Enhanced Superdense Coding over Correlated Amplitude Damping Channel |
title_full |
Enhanced Superdense Coding over Correlated Amplitude Damping Channel |
title_fullStr |
Enhanced Superdense Coding over Correlated Amplitude Damping Channel |
title_full_unstemmed |
Enhanced Superdense Coding over Correlated Amplitude Damping Channel |
title_sort |
enhanced superdense coding over correlated amplitude damping channel |
publisher |
MDPI AG |
series |
Entropy |
issn |
1099-4300 |
publishDate |
2019-06-01 |
description |
Quantum channels with correlated effects are realistic scenarios for the study of noisy quantum communication when the channels are consecutively used. In this paper, superdense coding is reexamined under a correlated amplitude damping (CAD) channel. Two techniques named as weak measurement and environment-assisted measurement are utilized to enhance the capacity of superdense coding. The results show that both of them enable us to battle against the CAD decoherence and improve the capacity with a certain probability. Remarkably, the scheme of environment-assisted measurement always outperforms the scheme of weak measurement in both improving the capacity and successful probability. These notable superiorities could be attributed to the fact that environment-assisted measurement can extract additional information from the environment and thus it performs much better. |
topic |
superdense coding correlated amplitude damping channel weak measurement environment-assisted measurement |
url |
https://www.mdpi.com/1099-4300/21/6/598 |
work_keys_str_mv |
AT yanlingli enhancedsuperdensecodingovercorrelatedamplitudedampingchannel AT dongmeiwei enhancedsuperdensecodingovercorrelatedamplitudedampingchannel AT chuanjinzu enhancedsuperdensecodingovercorrelatedamplitudedampingchannel AT xingxiao enhancedsuperdensecodingovercorrelatedamplitudedampingchannel |
_version_ |
1725148594732793856 |