The impact of ecological chaos on population dynamics has been an issue of intense discussion over the last decade. While many authors consider chaotic dynamics as a favourable factor facilitating species biodiversity, there is also a strong opinion that chaos may enhance population extinction....

We study a one-dimensional FitzHugh-like model showing Wenckebach rhythms. We analyze both, the role of the excitation period and the size of the necrotic defect (that is zones with no reaction terms) on the firing number (a well-known evolution parameter). This analysis shows that some...

The yield of a competitive–consecutive chemical reaction in a lamellar structure is shown to be strongly influenced by the order in which the lamellae are arranged. Average measures of lamellar width, which take no account of the particular arrangement of the lamellae, perform poorly in...

In this work, rates of the diffusion-controlled annihilation reaction A+A→nothing are studied by stochastic simulation as functions of jump probability on d-dimensional cubic lattices for d=2,3, and 4, at low densities. Standard bimolecular kinetics are observed for d=3 and 4. Small but...

Recently, it has been shown that the zero-energy eigenstate – corresponding to the stationary state – of a stochastic Hamiltonian with nearest-neighbour interaction in the bulk and single-site boundary terms, can generically be written in the form of a so-called matrix-product state. We...