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.

*Work at Rice is supported by NSF DMR-1920740 and Welch Foundation C-1411.
Work at Shanghai Jiao Tong University is sponsored by Natural Science Foundation of Shanghai with Grant No. 20ZR1428400, and additionally supported by a Shanghai talent program.

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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