QUANTUM PHASE TRANSITIONS; A RENORMALIZATION GROUP APPROACH

TITLE: QUANTUM PHASE TRANSITIONS; A RENORMALIZATION GROUP
APPROACH

AUTHORS: M. Crisan, I. Grosu, I. Tifrea and D. Bodea

Department of Theoretical Physics, University of Cluj, 3400 Cluj,
Romania

ABSTRACT:

We use the finite temperature Renormalization-Group method to describe the quantum phase transitions in the interacting Bose systems in d-dimensions, and in the fermionic systems. The Bose condensation and the occurrence of the non-Fermi behavior due to the proximity of the quantum critical point can be successfully described in d (d=2, d=3) dimensions. The results are in good agreement with the experimental data at low temperatures where the quantum effects are relevant.

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