Continuous phase transition between Neel and valence bond solid phases on a spin ladder system

ORAL

Abstract

We investigate a quantum phase transition between a Neel phase and a valence bond solid (VBS) phase in the J-Q-like model in one spatial dimension.
We study a spin-1/2 two-leg XXZ ladder with a four-spin interaction with the use of the variational uniform matrix product state algorithm and an effective field theory.
We determine the phase diagram and present evidences that the Neel-VBS transition belongs to the Gaussian universality class.

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Presenters

  • Takuhiro Ogino

    • Univ of Tokyo

Authors

  • Takuhiro Ogino

    • Univ of Tokyo

  • Ryui Kaneko

    • Kindai Univ.

  • Satoshi Morita

    • Univ of Tokyo

  • Shunsuke Furukawa

    • Keio Univ.

  • Naoki Kawashima

    • Univ of Tokyo
    • Institute for Solid State Physics, University of Tokyo