Abstract
We have studied systems composed of either elastic or inelastic particles constrained to move in one dimension and confined on a line by using molecular dynamics (MD) simulation techniques. We have tested several ways of modeling a boundary that exchanges energy with the system. Furthermore, we have studied one-dimensional granular systems composed of soft particles under cooling and found that the decay in temperature follows a power law $T\ensuremath{\propto}{t}^{\ensuremath{-}\ensuremath{\alpha}}$ similar to the case of rigid particles, but now, the value of $\ensuremath{\alpha}$ depends on the density and degree of inelasticity in the system. For systems composed of inelastic particles thermostated by one of the boundaries we find that the ``extraordinary'' state reported by Y. Du, H. Li, and L. P. Kadanoff [Phys. Rev. Lett. 74, 1268 (1995)] is an artifact introduced by method of providing energy to the system.
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