192 research outputs found
Numerical simulations on Szilard's engine and information erasure
We present a computational model for Szilard's engine and the information
discarding process. Taking advantage of a fact that the one is essentially the
reversed cycle of the other, we can discuss the both by employing the same
model. Through numerical simulations we calculate the work extracted by the
engine and the heat generation in the information discarding process. It is
found that these quantities depend on some realistic ingredients, which means
that the work done by the engine is no longer canceled by the heat generation
in the information erasure.Comment: 8 pages, 6 figures. submitted to Phys. Rev. Let
Growing length and time scales in a suspension of athermal particles
We simulate a relaxation process of non-brownian particles in a sheared
viscous medium; the small shear strain is initially applied to a system, which
then undergoes relaxation. The relaxation time and the correlation length are
estimated as functions of density, which algebraically diverge at the jamming
density. This implies that the relaxation time can be scaled by the correlation
length using the dynamic critical exponent, which is estimated as 4.6(2). It is
also found that shear stress undergoes power-law decay at the jamming density,
which is reminiscent of critical slowing down
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