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Dynamics of Fréedericksz transition in a fluctuating magnetic field
Sagués i Mestre, Francesc; San Miguel Ruibal, Maximino
Universitat de Barcelona
Fréedericksz transition under twist deformation in a nematic layer is discussed when the magnetic field has a random component. A dynamical model which includes the thermal fluctuations of the system is presented. The randomness of the field produces a shift of the instability point. Beyond this instability point the time constant characteristic of the approach to the stationary stable state decreases because of the field fluctuations. The opposite happens for fields smaller than the critical one. The decay time of an unstable state, calculated as a mean first-passage time, is also decreased by the field fluctuations.
2010-05-04
Cristalls líquids
Fluctuacions (Física)
Dinàmica de fluids
Liquid crystals
Fluctuation phenomena
(c) The American Physical Society, 1985
Article
The American Physical Society
         

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