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Fully quantum-mechanical model of a SQUID ring coupled to an electromagnetic field

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posted on 10.04.2013 by Mark Everitt, P.B. Stiffell, T.D. Clark, A. Vourdas, J.F. Ralph, H. Prance, R.J. Prance
A quantum system comprising of a monochromatic electromagnetic field coupled to a superconducting quantum interference device (SQUID) ring with sinusoidal nonlinearity is studied. A magnetostatic flux Φx is also threading the SQUID ring, and is used to control the coupling between the two systems. It is shown that for special values of Φx the system is strongly coupled. The time evolution of the system is studied. It is shown that exchange of energy takes place between the two modes and that the system becomes entangled. A second quasiclassical model that treats the electromagnetic field classically is also studied. A comparison between the fully quantum-mechanical model with the electromagnetic field initially in a coherent state and the quasiclassical model is made.

History

School

  • Science

Department

  • Physics

Citation

EVERITT, M.J. ... et al., 2001. Fully quantum-mechanical model of a SQUID ring coupled to an electromagnetic field. Physical Review B, 63 (14), 7 pp.

Publisher

© American Physical Society

Version

VoR (Version of Record)

Publication date

2001

Notes

This article was published in the journal, Physical Review B [© American Physical Society] and the definitive version is available at: http://dx.doi.org/10.1103/PhysRevB.63.144530

ISSN

0163-1829

Language

en

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