2019/09/30 by Adam Iaizzi, Harley D. Scammell, Harley D Scammell +4
Physics and Astronomy · #Antiferromagnetism #Bose–Einstein condensate #Condensed matter physics #Gauge theory #Magnetic field #Monte Carlo method #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum Monte Carlo #Quantum many-body systems #Quantum mechanics #Spinon #Theoretical and Computational Physics #Theoretical physics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.101.104412
published as Phys. Rev. B 101, 104412 (2020) · Published in Phys. Rev. B March 11, 2020
openalex publication_date 2020/03/11 · arxiv created 2020/03/12 · arxiv updated 2020/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The transition between the N'eel antiferromagnet and the valence-bond solid state in two dimensions has become a paradigmatic example of deconfined quantum criticality, a non-Landau transition characterized by fractionalized excitations (spinons). We consider an extension of this scenario whereby the deconfined spinons are subject to a magnetic field. The primary purpose is to identify the exotic scenario of a Bose-Einstein condensate of spinons. We employ quantum Monte Carlo simulations of the J\ensuremath-Q model with a magnetic field, and we perform a quantum field theoretic analysis of the magnetic field and temperature dependence of thermodynamic quantities. The combined analysis provides evidence for Bose-Einstein condensation of spinons and also demonstrates an extended temperature regime in which the system is best described as a gas of spinons interacting with an emergent gauge field.