Effects of quantum noises and noisy quantum operations on entanglement and special dense coding

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.024302· OSTI ID:21408336

Quek, Sylvanus; Ziang, Li; Ye, Yeo ^[1]

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1. Hwa Chong Institution, 661 Bukit Timah Road, Singapore 269734 (Singapore)

We show how noncommuting noises could cause a Bell state {chi}{sub 0} to suffer entanglement sudden death (ESD). ESD may similarly occur when a noisy operation acts, if the corresponding Hamiltonian and Lindblad operator do not commute. We study the implications of these in special dense coding S. When noises that cause ESD act, we show that {chi}{sub 0} may lose its capacity for S before ESD occurs. Similarly, {chi}{sub 0} may fail to yield information transfer better than classically possible when the encoding operations are noisy, though entanglement is not destroyed in the process.

• OSTI ID: 21408336
• Journal Information: Physical Review. A, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevA.81.024302; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
HAMILTONIANS
INFORMATION
NOISE
OPERATION
QUANTUM ENTANGLEMENT
YIELDS
MATHEMATICAL OPERATORS
QUANTUM OPERATORS