Universal Behavior of Sinai Billiard Systems in the Small-Scatterer Limit

Abstract
Sinai billiard systems are studied numerically and analytically. Let h be the Kolmogorov-Sinai entropy, τ the mean free time of the point mass, and ε the scaling factor of the size of convex scatters (so that ε0 implies vanishing scatters). The following universal behavior is conjectured for any periodic Lorentz model in d(>~2)-space: limε0hτ(lnε)=d.