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Persistent entanglement in the classical limit

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posted on 2013-04-08, 09:10 authored by Mark EverittMark Everitt, T.D. Clark, P.B. Stiffell, J.F. Ralph, A.R. Bulsara, C.J. Harland
The apparent difficulty in recovering classical nonlinear dynamics and chaos from standard quantum mechanics has been the subject of a great deal of interest over the last 20 years. For open quantum systems—those coupled to a dissipative environment and/or a measurement device—it has been demonstrated that chaotic-like behaviour can be recovered in the appropriate classical limit. In this paper, we investigate the entanglement generated between two nonlinear oscillators, coupled to each other and to their environment. Entanglement—the inability to factorize coupled quantum systems into their constituent parts—is one of the defining features of quantum mechanics. Indeed, it underpins many of the recent developments in quantum technologies. Here, we show that the entanglement characteristics of two 'classical' states (chaotic and periodic solutions) differ significantly in the classical limit. In particular, we show that significant levels of entanglement are preserved only in the chaotic-like solutions.

History

School

  • Science

Department

  • Physics

Citation

EVERITT, M.J. ... et al., 2005. Persistent entanglement in the classical limit. New Journal of Physics, 7, 64, 9 pp.

Publisher

© IOP Publishing Ltd and Deutsche Physikalische Gesellschaft

Version

  • VoR (Version of Record)

Publication date

2005

Notes

This article was published in the New Journal of Physics [© IOP Publishing Ltd and Deutsche Physikalische Gesellschaft] and contains IOP Publishing information ( http://iopscience.iop.org/page/STACKS#metadata) made available under a CC-BY 3.0 licence ( http://creativecommons.org/licenses/by/3.0/).

ISSN

1367-2630

Language

  • en

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