Noise effect on fidelity of two-qubit teleportation

Journal Article · Sat May 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.054302· OSTI ID:21413386

Xueyuan, Hu; Ying, Gu; Qihuang, Gong ^[1]; Guangcan, Guo ^[1]

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1. State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871 (China)

We investigate the effect of noise on a class of four-qubit entangled channels for two-qubit teleportation from Alice to Bob. These entangled channels include both parallel Bell pairs and inseparable channels with genuine multipartite entanglement. For the situation where only Bob's share of the entangled channel is subject to decoherence, we show by deriving a general expression for the teleported state that teleportation using noisy inseparable channels is equivalent to teleportation using noisy Bell pairs. When Alice's qubits are also subject to noise, we find that the inseparable channels never give a higher teleportation fidelity than Bell pairs, even in the presence of collective noise. Our results can shed some light on practical two-qubit teleportation.

• OSTI ID: 21413386
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
INFORMATION
NOISE
QUANTUM ENTANGLEMENT
QUANTUM INFORMATION
QUANTUM TELEPORTATION
QUBITS