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)