Brazilian Journal of Physics
On-line version ISSN 1678-4448
BOECHAT, Beatriz et al. Dynamical behavior of the four-body transverse Ising model with random bonds and fields. Braz. J. Phys. [online]. 2000, vol.30, n.4, pp. 693-696. ISSN 1678-4448. http://dx.doi.org/10.1590/S0103-97332000000400010.
We study the effect of random bonds and fields on the dynamical behavior of the one-dimensional transverse Ising model with four-spin interactions. We consider finite chains of increasing size to determine the time-dependent correlation function and the longitudinal relaxation function of the infinite chain. In this fully disordered system we observe a crossover from a collective modetype of dynamics to that of a central regime.