Spin dynamics in the transverse-field Ising chain at nonzero temperature

ORAL

Abstract

There has been considerable recent progress in elucidating the dynamics of the transverse-field Ising chain (TFIC) and in the search for candidate materials. Here, we study the spin dynamical structure factor in the quantum disordered region of TFIC. The study is carried out both in the continuum limit via a field-theory method and in the lattice model. We determine the local spin dynamics as a function of both frequency and temperature, and identify an unusual logarithmic correction factor. We discuss how our results can evince material realization of the TFIC universality.

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Presenters

  • Jiahao Yang

    Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China

Authors

  • Jiahao Yang

    Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China

  • Marton Kormos

    Budapest Univ of Tech, MTA-BME Quantum Dynamics and Correlations Research Group, Budapest University of Technology and Economics, 1111 Budapest, Budafoki út 8, Hungary

  • Jianda Wu

    Tsung-Dao Lee Institute and School of Physics & Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China, Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China

  • Qimiao Si

    Rice Univ, Physics and Astronomy, Rice university, Rice University, Department of Physics and Astronomy, Rice University, Department of Physics & Astronomy, Rice Center for Quantum Materials, Rice University, Houston, Texas 77005, USA