Enhancing teleportation fidelity by means of weak measurements or reversal

Journal Article · Sat Nov 15 00:00:00 EST 2014 · Annals of Physics (New York)

DOI:https://doi.org/10.1016/J.AOP.2014.07.012· OSTI ID:22403433

Qiu, Liang ^[1]; Tang, Gang; Yang, Xianqing ^[1]; Wang, Anmin ^[2]

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1. College of Sciences, China University of Mining and Technology, Xuzhou 221116 (China)
2. Department of Modern Physics, University of Science and Technology of China, Hefei 230026 (China)

The enhancement of teleportation fidelity by weak measurement or quantum measurement reversal is investigated. One qubit of a maximally entangled state undergoes the amplitude damping, and the subsequent application of weak measurement or quantum measurement reversal could improve the teleportation fidelity beyond the classical region. The improvement could not be attributed to the increasing of entanglement, quantum discord, classical correlation or total correlation. We declare that it should be owed to the probabilistic nature of the method. - Highlights: • The method’s probabilistic nature should be responsible for the improvement. • Quantum or classical correlation cannot explain the improvement. • The receiver cannot apply weak measurements. • The sender’s quantum measurement reversal is only useful for |Ψ{sup ±}〉.

• OSTI ID: 22403433
• Journal Information: Annals of Physics (New York), Vol. 350; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-4916
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
DAMPING
PROBABILISTIC ESTIMATION
QUANTUM ENTANGLEMENT
QUANTUM TELEPORTATION
QUBITS