Conserved mass aggregation model with mass-dependent fragmentation

Details Conserved mass aggregation model with mass-dependent fragmentation Conserved mass aggregation model with mass-dependent fragmentation

2007-12-21

arxiv.org/abs/0712.3622v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures, to be appeared in J. Korean Phys. Soc. (2008)

Scientific paper

We study a conserved mass aggregation model with mass-dependent fragmentation in one dimension. In the model, the whole mass $m$ of a site isotropically diffuse with unit rate. With rate $\omega$, a mass $m^{\lambda}$ is fragmented from the site and moves to a randomly selected nearest neighbor site. Since the fragmented mass is smaller than the whole mass $m$ of a site for $\lambda < 1$, the on-site attractive interaction exists for the case. For $\lambda = 0$, the model is known to undergo the condensation phase transitions from a fluid phase into a condensed phase as the density of total masses ($\rho$) increases beyond a critical density $\rho_c$. For $0< \lambda <1$, we numerically confirm for several values of $\omega$ that $\rho_c$ diverges with the system size $L$. Hence in thermodynamic limit, the condensed phase disappears and no transitions take place in one dimension. We also explain that there are no transitions in any dimensions.

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