Environment-assisted entanglement restoration and improvement of the fidelity for quantum teleportation

Three environment-assisted schemes are proposed to suppress the amplitude damping decoherence for entanglement distribution via weak measurement reversal. Based on the measurement of environment and appropriate weak measurement reversal operations, the initial entangled state can be recovered betwee...

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Bibliographic Details
Published inQuantum information processing Vol. 14; no. 11; pp. 4147 - 4162
Main Authors Xu, Xian-Mei, Cheng, Liu-Yong, Liu, A-Peng, Su, Shi-Lei, Wang, Hong-Fu, Zhang, Shou
Format Journal Article
LanguageEnglish
Published New York Springer US 01.11.2015
Subjects
Data Structures and Information Theory
Mathematical Physics
Physics
Physics and Astronomy
Quantum Computing
Quantum Information Technology
Quantum Physics
Spintronics
Weak measurement reversal
Entanglement restoration
Environmental measurement
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Summary:Three environment-assisted schemes are proposed to suppress the amplitude damping decoherence for entanglement distribution via weak measurement reversal. Based on the measurement of environment and appropriate weak measurement reversal operations, the initial entangled state can be recovered between two separated participants with high success probability and fidelity. In some specific cases, the restored optimal concurrence could reach up to 1 without requirement of the reversing measurement. Moreover, we concretely show that the proposed environment-assisted entanglement restoration can be applied to quantum teleportation to significantly improve the fidelity of the teleported state.
ISSN:1570-0755
1573-1332
DOI:10.1007/s11128-015-1111-0