High temperature dynamics in quantum compass models

Abstract

We analyze the high temperature spin dynamics of compass models using a moment expansion. We point out that the evaluation of moments maps to the enumeration of paths in a branching process on the lattice. This mapping to a statistical mechanics combinatorics problem provides an elegant visualization of the analysis. We present results for the time dependent spin correlation function (which is of relevance to NMR experiments) for two compass models: the Kitaev honeycomb model and two-dimensional compass model.

arXiv comment4 pages, 4 figures

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Cited by in corpus (4)

• Exact zero modes in a quantum compass chain under inhomogeneous transverse fields
• Spin liquid fingerprints in the thermal transport of a Kitaev-Heisenberg ladder
• Out-of-equilibrium dynamics of the Kitaev model on the Bethe lattice via coupled Heisenberg equations
• Operator growth in a quantum compass model on a Bethe lattice