Noise effect on fidelity of two-qubit teleportation
- 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, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevA.81.054302; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comment on 'Quantum teleportation of an arbitrary two-qubit state and its relation to multipartite entanglement'
Disentanglement, Bell-nonlocality violation and teleportation capacity of the decaying tripartite states