title: Thermodynamic second law in irreversible processes of chaotic few-body systems.
abstract: Irreversible processes of few hard-ball (N) mechanical systems are investigated numerically and compared with the theoretical results of quasistatic processes. The thermodynamic second law is valid for N>or=2 for both equilibrium and nonequilibrium systems if the average ensemble of the large number of identical systems is taken.
authors.affiliation: Center of Theoretical Physics, China Center for Advanced Science and Technology (CCAST), PO Box 8730, Beijing 100080, China.
authors.forename: G
authors.initials: G
authors.lastname: Hu
authors.forename: Z
authors.initials: Z
authors.lastname: Zheng
authors.forename: L
authors.initials: L
authors.lastname: Yang
authors.forename: W
authors.initials: W
authors.lastname: Kang