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      https://www.ias.ac.in/article/fulltext/pram/011/01/0085-0099

    • Keywords

       

      Heisenberg ferromagnet; spin coherent states

    • Abstract

       

      A new approach to Heisenberg ferromagnet using the spin coherent state representation is developed. The differential operator representation of spin angular momentum operators is used to derive thec-number analogs of the basic quantum mechanical equations, viz., the Schrödinger, Bloch and Liouville equations for the Heisenberg ferromagnet. As an important illustration of our formulation, which has noad hoc assumptions and does not use any boson representation, the excitation spectrum for one, two and three spin waves is obtained. In these cases it is also shown that eigenvalue spectrum can be obtained by completely ignoring the kinematical interactions.

    • Author Affiliations

       

      B Sriram Shastry1 G S Agarwal1 I Rama Rao1 2

      1. School of Physics, University of Hyderabad, Hyderabad - 500 001
      2. Tata Institute of Fundamental Research, Bombay - 400 005
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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