Entanglement sharing and decoherence in the spin-bath

Journal Article · Sun May 15 04:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.71.052321· OSTI ID:20717732

Dawson, Christopher M; McKenzie, Ross H ^[1]; Hines, Andrew P; Milburn, G J ^[2]

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1. School of Physical Sciences, University of Queensland, St Lucia, QLD 4072 (Australia)
2. Centre for Quantum Computer Technology, The University of Queensland, St Lucia, QLD 4072 (Australia)

The monogamous nature of entanglement has been illustrated by the derivation of entanglement-sharing inequalities--bounds on the amount of entanglement that can be shared among the various parts of a multipartite system. Motivated by recent studies of decoherence, we demonstrate an interesting manifestation of this phenomena that arises in system-environment models where there exists interactions between the modes or subsystems of the environment. We investigate this phenomenon in the spin-bath environment, constructing an entanglement-sharing inequality bounding the entanglement between a central spin and the environment in terms of the pairwise entanglement between individual bath spins. The relation of this result to decoherence will be illustrated using simplified system-bath models of decoherence.

• OSTI ID: 20717732
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 71; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BOUND STATE
INFORMATION THEORY
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
SPIN