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Mean-field approximation is often used to explore the qualitative behaviour of phase transitions in classical spin models before employing computationally costly methods such as the Monte-Carlo techniques. We implement a lattice site-resolved mean-field spin model that allows efficient simulation of phase transitions between phases of complex magnetic domains, such as magnetic helices, skyrmions, or states with canted spins. The framework is useful as a complementary approach for pre-screening the qualitative features of phase diagrams in complex magnets.
We consider nonlinear magnon interactions in collinear antiferromagnetic (AF) insulators at finite temperatures. In AF systems with biaxial magnetocrystalline anisotropy, we implement a self-consistent Hartree-Fock mean-field approximation to explore
We discuss the emergence of an effective low-energy theory for the real-time dynamics of two classical impurity spins within the framework of a prototypical and purely classical model of indirect magnetic exchange: Two classical impurity spins are em
A recent interesting paper [Yucesoy et al. Phys. Rev. Lett. 109, 177204 (2012), arXiv:1206:0783] compares the low-temperature phase of the 3D Edwards-Anderson (EA) model to its mean-field counterpart, the Sherrington-Kirkpatrick (SK) model. The autho
Structural glasses feature quasilocalized excitations whose frequencies $omega$ follow a universal density of states ${cal D}(omega)!sim!omega^4$. Yet, the underlying physics behind this universality is not fully understood. Here we study a mean-fiel
We study a system of interacting triplons (the elementary excitations of a valence-bond solid) described by an effective interacting boson model derived within the bond-operator formalism. In particular, we consider the square lattice spin-1/2 $J_1$-