Dynamical Aspects in the Noise-Induced Freedericksz Instability

  • F. Sagués
  • M. San Miguel
Conference paper
Part of the Springer Series in Synergetics book series (SSSYN, volume 27)


The role of the internal and external fluctuations in certain dynamical aspects associated with the so-called Freedericksz transition corresponding to a nematic liquid crystal under twist deformation is analyzed [1]. The external fluctuations come from the applied magnetic field viewed as a random control parameter. Owing to its nonlinearity we are faced with very interesting features concerning the appropiate formulation of the model via a Langevin or a Fokker-Planck equation [2]. Moreover, the global (internal), fluctuations of the system are taken into account through a time-dependent Ginzburg-Landau approach (TDGL).


  1. 1).
    W. Horsthemke and R. Lefever: Noise-Induced Transitions (Springer-Verlag, Berlin 1984).MATHGoogle Scholar
  2. 2).
    F. Sagues, M. San Miguel and J.M. Sancho: Z.Phys. B55, 269 (1984).ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1984

Authors and Affiliations

  • F. Sagués
    • 1
    • 2
  • M. San Miguel
    • 1
  1. 1.Departament de Fisica TeòricaUniversitat de BarcelonaBarcelonaSpain
  2. 2.Departament de Quimica FisicaUniversitat de BarcelonaBarcelonaSpain

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