Issue
EPL
Volume 86, Number 4, May 2009
Article Number 40009
Number of page(s) 6
Section General
DOI http://dx.doi.org/10.1209/0295-5075/86/40009
Published online 04 June 2009
EPL, 86 (2009) 40009
DOI: 10.1209/0295-5075/86/40009

Effects of Pauli channels and noisy quantum operations on standard teleportation

Ye Yeo1, Zhe-Wei Kho2 and Lixian Wang2

1   Department of Physics, National University of Singapore - 10 Kent Ridge Crescent, Singapore 119260, Singapore
2   Hwa Chong Institution - 661 Bukit Timah Road, Singapore 269734, Singapore

phyyy@nus.edu.sg

received 6 March 2009; accepted in final form 4 May 2009; published May 2009
published online 4 June 2009

Abstract
Quantum noises generated by non-commuting Pauli operators may also cause entanglement sudden death (ESD). In this work, stimulated by this observation, we show how a Pauli-X or -Y gate could also destroy entanglement in a finite time when they are executed in the presence of dephasing noise. Motivated by the fact that they are basic to quantum information processing, we analyze the impact of noisy operations and non-commuting noises on single- and two-qubit teleportation —archetype of quantum communication. By considering the decoherence dynamics during establishment of the channel states and noisy recovery operations, we show that there is a finite lifetime for a standard teleportation to be completed before it loses the quantum advantage over purely classical communication.

PACS
03.65.Yz - Decoherence; open systems; quantum statistical methods.
03.67.Hk - Quantum communication.

© EPLA 2009