Abstract
The duration of the quasistationary states (QSSs) emerging in the -dimensional classical inertial model, i.e., planar rotators whose interactions decay with the distance as (), is studied through first-principles molecular dynamics. These QSSs appear along the whole long-range interaction regime (), for an average energy per rotator (), and they do not exist for . They are characterized by a kinetic temperature , before a crossover to a second plateau occurring at the Boltzmann-Gibbs temperature . We investigate here the behavior of their duration when approaches from below, for large values of . Contrary to the usual belief that the QSS merely disappears as , we show that its duration goes through a critical phenomenon, namely . Universality is found for the critical exponent throughout the whole long-range interaction regime.
- Received 4 May 2021
- Accepted 13 July 2021
DOI:https://doi.org/10.1103/PhysRevE.104.014144
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