Unifying static and dynamic properties in 3D quantum antiferromagnets

Abstract

Quantum Monte Carlo simulations offer an unbiased means to study the static and dynamic properties of quantum critical systems, while quantum field theory provides direct analytical results. We study three dimensional, critical quantum antiferromagnets by performing a combined analysis using both quantum field theory calculations and quantum Monte Carlo data. Explicitly, we analyze the order parameter (staggered magnetization), Néel temperature, quasiparticle gaps, and the susceptibilities in the scalar and vector channels. We connect the two approaches by deriving descriptions of the quantum Monte Carlo observables in terms of the quasiparticle excitations of the field theory. The remarkable agreement not only unifies the description of the static and dynamic properties of the system, but also constitutes a thorough test of perturbative O(3) quantum field theory and opens new avenues for the analytical guidance of detailed numerical studies.

New, improved, extended discussion throughout and in particular of Higgs linewidth comparison

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Cited by in corpus (4)

• Classification for the universal scaling of Néel temperature and staggered magnetization density of three-dimensional dimerized spin-1/2 antiferromagnets
• Pressure-tuned quantum criticality in the large-$D$ antiferromagnet DTN
• Universal scaling of three-dimensional dimerized quantum antiferromagnets on bipartite lattices
• Phase transitions in the spin-1/2 Heisenberg antiferromagnet on the dimerized diamond lattice