Caramico D'Auria, Alvaro (2009) Disorder-induced quantum-Griffiths-like features from a non-conventional renormalization group analysis near four dimensions. [Pubblicazione in rivista scientifica]

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Item Type: Pubblicazione in rivista scientifica
Uncontrolled Keywords: quantum criticality, quenched disorder, crossover phenomena
Date Deposited: 21 Oct 2010 06:57
Last Modified: 30 Apr 2014 19:43
URI: http://www.fedoa.unina.it/id/eprint/7489

Abstract

We investigate the role played by symmetry conserving quenched disorder on quantum criticality of a variety of d-dimensional systems with a continuous symmetry order parameter.We employ a non standard procedure which combines a preliminary reduction to an effective classical problem and a successive renormalization group treatment. We find a quantum critical point scenario exhibiting unusual features, which remind us of some predictions of the quantum Griffiths phase model

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