A non conventional Renormalization Group treatment close and below four dimensions is used to explore the low temperature properties of a wide class of systems in the influence domain of their quantum critical point. The approach consists in a preliminary averaging over quantum degrees of freedom and a successive employment of the Wilsonian RG trasformation to treat the resulting effective Ginzburg-Landau free energy functional. Thia allows a detailed study of criticality of the quantum systems.
Unified static renormalization-group treatment of finite-temperature crossovers close to a quantum critical point / M. T., Mercaldo; L., De Cesare; I., Rabuffo; CARAMICO D'AURIA, Alvaro. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 75:(2007), pp. 014105-1-014105-14. [10.1103/PhysRevB.75.014105]
Unified static renormalization-group treatment of finite-temperature crossovers close to a quantum critical point
CARAMICO D'AURIA, ALVARO
2007
Abstract
A non conventional Renormalization Group treatment close and below four dimensions is used to explore the low temperature properties of a wide class of systems in the influence domain of their quantum critical point. The approach consists in a preliminary averaging over quantum degrees of freedom and a successive employment of the Wilsonian RG trasformation to treat the resulting effective Ginzburg-Landau free energy functional. Thia allows a detailed study of criticality of the quantum systems.| File | Dimensione | Formato | |
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