Dynamical critical behavior on the Nishimori point of frustrated Ising models

Abstract

By considering the quench dynamics of two-dimensional frustrated Ising models through numerical simulations, we investigate the dynamical critical behavior on the multicritical Nishimori point (NP). We calculate several dynamical critical exponents, namely, the relaxation exponent $z_{\mathrm{c}}$, the autocorrelation exponent ${\lambda }_{\mathrm{c}}$, and the persistence exponent ${\theta }_{\mathrm{c}}$, after a quench from the high temperature phase to the NP. We confirm their universality with respect to the lattice geometry and bond distribution. For a quench from a power-law correlated initial state to the NP, the aging dynamics are much slower. We also look up the issue of multifractality during the critical dynamics by investigating different moments of the spatial correlation function. We observe a single growth law for all the length scales extracted from different moments, indicating that the equilibrium multifractality at the NP does not affect the dynamics.

arXiv comment28 pages, 9 figures

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Cited by in corpus (1)

• Boundary Criticality at the Nishimori Multicritical Point