Modeling Flocks and Prices: Jumping Particles with an Attractive Interaction

Details Modeling Flocks and Prices: Jumping Particles with an Attractive Interaction Modeling Flocks and Prices: Jumping Particles with an Attractive Interaction

2011-07-17

arxiv.org/abs/1107.3289v1

Mathematics

Probability

35 pages, 9 figures

Scientific paper

We introduce and investigate a new model of a finite number of particles jumping forward on the real line. The jump lengths are independent of everything, but the jump rate of each particle depends on the relative position of the particle compared to the center of mass of the system. The rates are higher for those left behind, and lower for those ahead of the center of mass, providing an attractive interaction keeping the particles together. We prove that in the fluid limit, as the number of particles goes to infinity, the evolution of the system is described by a mean field equation that exhibits traveling wave solutions. A connection to extreme value statistics is also provided.

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