Unifying static and dynamic properties in three-dimensional quantum antiferromagnets
| Autor: | Yaroslav A. Kharkov, Yan Qi Qin, Bruce Normand, Zi Yang Meng, Oleg P. Sushkov, Harley D. Scammell |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Quantum Monte Carlo Scalar (mathematics) Observable 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetization 0103 physical sciences Quasiparticle Field theory (psychology) Statistical physics Quantum field theory 010306 general physics 0210 nano-technology Quantum |
| Zdroj: | Physical Review B. 96 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | 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), N\'eel 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. |
| Databáze: | OpenAIRE |
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