The nature of quantum phase transition in quantum compass model

ORAL

Abstract

In this work, we show that the quantum compass model in two dimension can be mapped to a fermionic model with local density interaction and the quantum phase transition point at the symmetric point Jx=Jz marks a first order phase transition.

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Authors

  • Han-Dong Chen

    • Department of Applied Physics, Stanford University and Department of Physics, UIUC

  • Chen Fang

    • Department of Physics, Purdue University

  • Jiangping Hu

    • Department of Physics, Purdue University
    • Purdue University

  • Hong Yao

    • Departmenf of Physics, Stanford University