Fluctuation and dissipation in liquid crystal electroconvection

W. I. Goldburg (1) , Y. Y. Goldschmidt (1) , H. Kellay (2)

1 Department of Physics and Astronomy [Pittsburgh]
2 CPMOH - Centre de physique moléculaire optique et hertzienne

The power dissipation P(t) was measured in a liquid crystal (MBBA) driven by an ac voltage into the chaotic electroconvective state. In that state, the power fluctuates about its mean value 〈P〉. The quantity measured, and compared with the fluctuation theorem of Gallavotti and Cohen, is the dimensionless standard deviation of the fluctuations, σP/〈P〉.

Mots clés: 05.40.−a; 61.30.−v; 05.70.Ln; 47.52.+j

Domaines: Matière Molle [cond-mat.soft]

W. I. Goldburg, Y. Y. Goldschmidt, H. Kellay. Fluctuation and dissipation in liquid crystal electroconvection. Meeting on Horizons in Complex Systems, Dec 2001, Messina, Italy. pp.391-395, ⟨10.1016/S0378-4371(02)01155-X⟩. ⟨hal-01550665⟩