Vortices in Josephson arrays interacting with non-classical microwaves: The effect of dissipation

ANASTASIA KONSTANTOPOULOU, J. M. Hollingworth, M. Everitt, A. Vourdas, T. D. Clark, J. F. Ralph

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Vortices circulating in a ring made from a Josephson array in the insulating phase are studied. The ring contains a ‘dual Josephson junction’ through which the vortices tunnel. External non-classical microwaves are coupled to the device. The time evolution of this two-mode fully quantum mechanical system is studied, taking into account the dissipation in the system. The effect of the quantum statistics of the photons on the quantum statistics of the vortices is discussed. Entropic calculations quantify the entanglement between the two systems. Quantum phenomena in the system are also studied through Wigner functions. After a certain time (which depends on the dissipation parameters) these quantum phenomena are destroyed due to dissipation.
Original languageEnglish
Pages (from-to)279-285
Number of pages7
JournalEuropean Physical Journal B
Volume32
Issue number3
DOIs
Publication statusPublished - 11 Apr 2003
Externally publishedYes

Keywords

  • Josephson arrays
  • Dissipation
  • SQUID

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