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 originale | English |
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pagine (da-a) | 182-188 |
Numero di pagine | 7 |
Rivista | Europhysics Letters |
Volume | 76 |
Stato di pubblicazione | Published - 2006 |
All Science Journal Classification (ASJC) codes
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