We have revisited quantum criticality of d- dimensional n-vector transverse Ising-like models by means of a one-loop renormalization group approach with temperature scaling. A careful analysis of the quantum regime for d ≤ 3 allows us to explore the low-temperature phase diagram and to derive new features which occur close to the quantum critical point within the disordered phase. In particular for d ≤ 3 a crossover of the shift exponent from the value ψ = d-1 ( as for d ≥ 3 ) to ψ = 2 is found decreasing the temperature to zero.
Quantum criticality of d-dimensional n-vector transverse Ising-like models / CARAMICO D'AURIA, Alvaro; L., De Cesare; M. T., Mercaldo; A., Naddeo; I., Rabuffo. - In: PHYSICA. A. - ISSN 0378-4371. - STAMPA. - 392:(2013), pp. 3997-4008. [10.1016/j.physa.2013.04.051]
Quantum criticality of d-dimensional n-vector transverse Ising-like models
CARAMICO D'AURIA, ALVARO;
2013
Abstract
We have revisited quantum criticality of d- dimensional n-vector transverse Ising-like models by means of a one-loop renormalization group approach with temperature scaling. A careful analysis of the quantum regime for d ≤ 3 allows us to explore the low-temperature phase diagram and to derive new features which occur close to the quantum critical point within the disordered phase. In particular for d ≤ 3 a crossover of the shift exponent from the value ψ = d-1 ( as for d ≥ 3 ) to ψ = 2 is found decreasing the temperature to zero.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
