Discontinuous Absorbing State Transition in $(1+1)$ Dimension

Details Discontinuous Absorbing State Transition in $(1+1)$ Dimension Discontinuous Absorbing State Transition in $(1+1)$ Dimension

2010-10-11

arxiv.org/abs/1010.2007v1

Physics

Condensed Matter

Statistical Mechanics

5 pages, 4 eps figures

Scientific paper

A $(1+1)$ dimensional model of directed percolation is introduced where sites on a tilted square lattice are connected to their neighbours by $N$ channels, operated at both ends by valves which are either open or closed. The spreading fluid is assumed to propagate from any site to the neighbours in a specified direction only through those channels which have open valves at both sites. We show that the system undergoes a discontinuous absorbing state transition in the large $N$ limit when the number of open valves at each site $n$ crosses a threshold value $n_c=\sqrt N.$ Remarkable dynamical properties of discontinuous transitions, like hysteresis and existence of two well separated fluctuating phases near the critical point are also observed. The transition is found to be discontinuous in all $(d+1)$ dimensions.

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