Lukierska-Walasek, K. - In: Physica A: Statistical Mechanics and its Applications 127 (1984) 3, pp. 613-626
The field theoretic renormalization group method, proposed recently as a description of the quantum crossover in the transverse Ising model, is now adopted to the study of the similar effect in the X−Y model in a transverse field. The crossover scaling form of the inverse correlation length...