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Improving the teleportation of quantum Fisher information under non-Markovian environment |
| Yan-Ling Li(李艳玲)1,†, Yi-Bo Zeng(曾艺博)1, Lin Yao(姚林)1, and Xing Xiao(肖兴)2,‡ |
1 School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2 College of Physics and Electronic Information, Gannan Normal University, Ganzhou 341000, China |
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Abstract Quantum teleportation is designed to send an unknown quantum state between two parties. In the perspective of remote quantum metrology, one may be interested in teleporting the information that is encoded by physical parameters synthesized by quantum Fisher information (QFI). However, the teleported QFI is often destroyed by the unavoidable interaction between the system and the environment. Here, we propose two schemes to improve the teleportation of QFI in the non-Markovian environment. One is to control the quantum system through the operations of weak measurement (WM) and corresponding quantum measurement reversal (QMR). The other is to modify the quantum system based on the monitoring result of the environment (i.e., environment-assisted measurement, EAM). It is found that, in the non-Markovian environment, these two schemes can improve the teleportation of QFI. By selecting the appropriate strengths of WM and QMR, the environment noise can be completely eliminated and the initial QFI is perfectly teleported. A comprehensive comparison shows that the second scheme not only has a higher probability of success than the first one, but also has a significant improvement of the teleported QFI.
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Received: 09 February 2022
Revised: 28 March 2022
Accepted manuscript online: 06 April 2022
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PACS:
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03.67.Hk
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(Quantum communication)
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03.67.-a
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(Quantum information)
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61765007 and 12265004), Jiangxi Provincial Natural Science Foundation, China (Grant No. 20212ACB211004), and Innovation Foundation of Jiangxi University of Science and Technology (Grant No. XY2021-S088). |
Corresponding Authors:
Yan-Ling Li, Xing Xiao
E-mail: liyl423@126.com;xiaoxing@gnnu.edu.cn
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Cite this article:
Yan-Ling Li(李艳玲), Yi-Bo Zeng(曾艺博), Lin Yao(姚林), and Xing Xiao(肖兴) Improving the teleportation of quantum Fisher information under non-Markovian environment 2023 Chin. Phys. B 32 010303
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