Scaling of Berry's phase close to the Dicke quantum phase transition

Angelo Carollo, Liberti, Angelo Carollo, Plastina

Risultato della ricerca: Article

38 Citazioni (Scopus)

Abstract

We discuss the thermodynamic and finite-size scaling properties of the geometric phase in the adiabatic Dicke model, describing a quantum phase transition for an N qubit register coupled to a slow oscillator mode. We show that, in the thermodynamic limit, a non-zero Berry phase is obtained only if a path in parameter space is followed that encircles the critical point. Furthermore, we investigate the precursors of this critical behavior for a system with finite size and obtain the leading orders in the 1/N expansion of the Berry phase and its critical exponent
Lingua originaleEnglish
pagine (da-a)182-188
Numero di pagine7
RivistaEurophysics Letters
Volume76
Stato di pubblicazionePublished - 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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