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      https://www.ias.ac.in/article/fulltext/pram/092/04/0061

    • Keywords

       

      Ising model; quantum quench; concurrence; quantum renormalisation group

    • Abstract

       

      The quantum quench dynamics of the one-dimensional Ising model in transverse field is investigated using the quantum renormalisation group method. The analytic expression of concurrence $C(t)$ is obtained, where the initial state is a superposition state which is constructed from the eigenstates of pure Ising system. The effect of parameter $a$ in the period and range of concurrence are exhibited respectively in the vicinity of the critical point, which show scaling behaviour. When effective magnetic field $g$ is big enough, the maximum limit value is 1.0. However, the minimum value is different, which is also dependent on the evolved time $t$.

    • Author Affiliations

       

      WEI-KE ZOU1 NUO-WEI LI1 CHONG HAN1 DONG-DONG LIU1

      1. College of Mathematics and Physics, Xuzhou University of Technology, Xuzhou, China
    • Dates

       
  • Pramana – Journal of Physics | News

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