B. Yurke et al., EXPERIMENTAL-MEASUREMENT OF THE PERSISTENCE EXPONENT OF THE PLANAR ISING-MODEL, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 56(1), 1997, pp. 40-42
Using a twisted nematic liquid crystal system exhibiting planar Ising
model dynamics, we have measured the scaling exponent theta, which cha
racterizes the time evolution p(t)similar to t(-theta), of the probabi
lity p(t) that the local order parameter has not switched its state by
the time t. For 0.4 sec-200 set following the phase quench, the syste
m exhibits scaling behavior and, measured over this interval, theta=0.
19+/-0.03, in good agreement with theoretical analysis and numerical s
imulations.