Direct equivalence between quantum phase transition phenomena in radiation-matter and magnetic systems: Scaling of entanglement

J. Reslen, L. Quiroga, Neil F Johnson

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

We show that the quantum phase transition arising in a standard radiation-matter model (Dicke model) belongs to the same universality class as the infinitely coordinated, transverse-field XY model. The effective qubit-qubit exchange interaction is shown to be proportional to the square of the qubit-radiation coupling. A universal finite-size scaling is derived for the corresponding two-qubit entanglement (concurrence) and a size-consistent effective Hamiltonian is proposed for the qubit subsystem.

Original languageEnglish (US)
Pages (from-to)8-14
Number of pages7
JournalEPL
Volume69
Issue number1
DOIs
StatePublished - Jan 2005
Externally publishedYes

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equivalence
scaling
radiation
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Direct equivalence between quantum phase transition phenomena in radiation-matter and magnetic systems : Scaling of entanglement. / Reslen, J.; Quiroga, L.; Johnson, Neil F.

In: EPL, Vol. 69, No. 1, 01.2005, p. 8-14.

Research output: Contribution to journalArticle

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