Iaizzi, AdamScammell, Harley D.Sushkov, Oleg P.Sandvik, Anders W.2021-07-302021-07-302020-03-11Adam Iaizzi, Harley D Scammell, Oleg P Sushkov, Anders W Sandvik. "Bose-Einstein condensation of deconfined spinons in two dimensions." Physical Review B, Volume 101, Issue 10, 2020. https://doi.org/10.1103/physrevb.101.1044122469-99502469-9969https://hdl.handle.net/2144/42815The transition between the Néel 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−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.en-USPhysicsArticle10.1103/physrevb.101.1044120000-0002-5638-4619 (Sandvik, Anders W)488001