Propagation of chaos and moderate interaction for a piecewise deterministic system of geometrically enriched particles
File(s)Diez2020PropagationChaosPDMPGeometry.pdf (411.27 KB)
Published version
Author(s)
Diez, Antoine
Type
Journal Article
Abstract
In this article we study a system of N particles, each of them being defined by the couple of a position (in Rd) and a so-called orientation which is an element of a compact Riemannian manifold. This orientation can be seen as a generalisation of the velocity in Vicsek-type models such as [20, 16]. We will assume that the orientation of each particle follows a jump process whereas its position evolves deterministically between two jumps. The law of the jump depends on the position of the particle and the orientations of its neighbours. In the limit N→+∞, we first prove a propagation of chaos result which can be seen as an adaptation of the classical result on McKean-Vlasov systems [53] to Piecewise Deterministic Markov Processes (PDMP). As in [38], we then prove that under a proper rescaling with respect to N of the interaction radius between the agents (moderate interaction), the law of the limiting mean-field system satisfies a BGK equation with localised interactions which has been studied as a model of collective behaviour in [14]. Finally, in the spatially homogeneous case, we give an alternative approach based on martingale arguments.
Date Issued
2020-08-06
Date Acceptance
2020-07-04
Citation
Electronic Journal of Probability, 2020, 25 (0), pp.1-38
ISSN
1083-6489
Publisher
Institute of Mathematical Statistics
Start Page
1
End Page
38
Journal / Book Title
Electronic Journal of Probability
Volume
25
Issue
0
Copyright Statement
© 2020 The Author(s). Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).
License URL
Identifier
https://projecteuclid.org/euclid.ejp/1596679586
Subjects
0104 Statistics
0105 Mathematical Physics
Statistics & Probability
Publication Status
Published
Article Number
90
Date Publish Online
2020-08-06