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    • A new formalism for the statistical dynamics of vector spin systems

      Kamlesh Kumari Deepak Kumar

      Volume 43 Issue 4 October 1994 pp 289-305

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/043/04/0289-0305

    • Keywords

       

      Relaxational dynamics; vector Heisenberg model; Fokker-Planck equation; mean field approximation

    • Abstract

       

      The relaxational dynamics of a classical vector Heisenberg spin system is studied using the Fokker-Planck equation. To calculate the eigenvalues of the Fokker-Planck operator, a new approach is introduced. In this connection, a number space repesentation is introduced, which enables us to visualize the eigenvalue structure of the Fokker-Planck operator. The mean field approximation is derived and a systematic method to improve the mean field approximation is presented.

    • Author Affiliations

       

      Kamlesh Kumari1 Deepak Kumar1 2

      1. Department of Physics, University of Roorkee, Roorkee - 247 667, India
      2. School of Physical Sciences, Jawaharlal Nehru University, New Delhi - 110067, India

    • Dates

       
      Published
      October 1994
      Manuscript received
      12 April 1994
      Manuscript revised
      28 June 1994

  • Pramana – Journal of Physics | News

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