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Quasistationary states and the range of pair interactions
A Gabrielli1, M Joyce, B Marcos
1SMC, CNR-INFM, Physics Department, University Sapienza of Rome, Piazzale Aldo Moro 2, 00185-Rome, Italy.
Abstract:
"Quasistationary" states are approximately time independent out of equilibrium states which have been observed in a variety of systems of particles interacting by long-range interactions. We investigate here the conditions of their occurrence for a generic pair interaction V(r→∞)~1/r(γ) with γ>0, in d>1 dimensions. We generalize analytic calculations known for gravity in d=3 to determine the scaling parametric dependences of their relaxation rates due to two-body collisions, and report extensive numerical simulations testing their validity. Our results lead to the conclusion that, for γ
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