Decoherence suppression of tripartite entanglement in non-Markovian environments by using weak measurements

Journal Article · Wed Feb 15 00:00:00 EST 2017 · Annals of Physics

DOI:https://doi.org/10.1016/J.AOP.2016.12.004· OSTI ID:22617465

Ding, Zhi-yong ^[1]; He, Juan ^[2]; Ye, Liu ^[1]

---

1. School of Physics & Material Science, Anhui University, Hefei 230039 (China)
2. School of Physics & Electronic Engineering, Fuyang Normal University, Fuyang 236037 (China)

A feasible scheme for protecting the Greenberger–Horne–Zeilinger (GHZ) entanglement state in non-Markovian environments is proposed. It consists of prior weak measurement on each qubit before the interaction with decoherence environments followed by post quantum measurement reversals. It is shown that both the fidelity and concurrence of the GHZ state can be effectively improved. Meanwhile, we also verified that our scenario can enhance tripartite nonlocality remarkably. In addition, the result indicates that the larger the weak measurement strength, the better the effectiveness of the scheme with the lower success probability.

• OSTI ID: 22617465
• Journal Information: Annals of Physics, Vol. 377; Other Information: Copyright (c) 2016 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
QUANTUM DECOHERENCE
QUANTUM ENTANGLEMENT
QUBITS