Deconfined quantum criticality of easy-plane J-Q model

ORAL

Abstract

Motivated by the recently confirmed duality relation between bosonic topological phase transition and deconfined quantum critical (DQC) point [1], we perform systematic numerical investigations of the critical properties of the easy-plane JQ model, in which the DQC point is realized. By means of stochastic series expansion quantum Monte Carlos simulation and finite-size analysis, we investigate the quantum phase transition between the antiferromagnetic XY phase and the valence-bond solid phase at varies values of the uniaxial anisotropy. In the easy-plane limit the transition is found to be first order, but for a range of weaker anisotropies the transition is continuous and governed by the DQC point with emergent SO(4) symmetry. We demonstrate this using scaling analysis for several quantities.
[1]Y. Qin, Y-Yao He, Y. You, Z-Y. Lu, A. Sen, A. W. Sandvik, C. Xu and Z. Y. Meng, Phys. Rev. X 7, 031052 (2017)

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Presenters

  • Nusen Ma

    Chinese Academy of Sciences

Authors

  • Nusen Ma

    Chinese Academy of Sciences

  • Anders Sandvik

    Physics, Boston University, Boston University, Boston Univ, Department of Physics, Boston University

  • Cenke Xu

    Physics, University of California, Santa Barbara, University of California, Santa Barbara, Univ of California - Santa Barbara, UCSB

  • Yizhuang You

    Physics, Harvard University, Harvard, Harvard University

  • ZiYang Meng

    T03, Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, The Institute of Physics, Chinese Academy of Sciences, Chinese Academy of Scienes (CAS), Institution of physics, Chinese Academic of Sciences (CAS)