Enhancing entanglement trapping by weak measurement and quantum measurement reversal

Journal Article · Sun Mar 15 00:00:00 EDT 2015 · Annals of Physics

DOI:https://doi.org/10.1016/J.AOP.2014.12.010· OSTI ID:22447602

Zhang, Ying-Jie ^[1]; Han, Wei ^[1]; Fan, Heng ^[2]; Xia, Yun-Jie ^[1]

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1. Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165 (China)
2. Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 (China)

In this paper, we propose a scheme to enhance trapping of entanglement of two qubits in the environment of a photonic band gap material. Our entanglement trapping promotion scheme makes use of combined weak measurements and quantum measurement reversals. The optimal promotion of entanglement trapping can be acquired with a reasonable finite success probability by adjusting measurement strengths. - Highlights: • Propose a scheme to enhance entanglement trapping in photonic band gap material. • Weak measurement and its reversal are performed locally on individual qubits. • Obtain an optimal condition for maximizing the concurrence of entanglement trapping. • Entanglement sudden death can be prevented by weak measurement in photonic band gap.

• OSTI ID: 22447602
• Journal Information: Annals of Physics, Vol. 354; Other Information: Copyright (c) 2015 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
BAND THEORY
QUANTUM ENTANGLEMENT
QUBITS
TRAPPING