In the context of self-stabilizing processes, that is processes attracted by their own law, living in a potential landscape, we investigate different properties of the invariant measures. The interaction between the process and its law leads to nonlinear stochastic differential equations. In [S. Herrmann and J. Tugaut. Electron. J. Probab. 15 (2010) 2087-2116], the authors proved that, for linear interaction and under suitable conditions, there exists a unique symmetric limit measure associated to the set of invariant measures in the small-noise limit. The aim of this study is essentially to point out that this statement leads to the existence, as the noise intensity is small, of one unique symmetric invariant measure for the self-stabilizing process. Informations about the asymmetric measures shall be presented too. The main key consists in estimating the convergence rate for sequences of stationary measures using generalized Laplace's method approximations.

Keywords: self-interacting diffusion, McKean-Vlasov equation, stationary measures, double-well potential, perturbed dynamical system, Laplace's method, fixed point theorem, uniqueness problem

@article{PS_2012__16__277_0, author = {Herrmann, Samuel and Tugaut, Julian}, title = {Self-stabilizing processes: uniqueness problem for stationary measures and convergence rate in the small-noise limit}, journal = {ESAIM: Probability and Statistics}, pages = {277--305}, publisher = {EDP-Sciences}, volume = {16}, year = {2012}, doi = {10.1051/ps/2011152}, mrnumber = {2956576}, zbl = {1302.60112}, language = {en}, url = {http://archive.numdam.org/articles/10.1051/ps/2011152/} }

TY - JOUR AU - Herrmann, Samuel AU - Tugaut, Julian TI - Self-stabilizing processes: uniqueness problem for stationary measures and convergence rate in the small-noise limit JO - ESAIM: Probability and Statistics PY - 2012 SP - 277 EP - 305 VL - 16 PB - EDP-Sciences UR - http://archive.numdam.org/articles/10.1051/ps/2011152/ DO - 10.1051/ps/2011152 LA - en ID - PS_2012__16__277_0 ER -

%0 Journal Article %A Herrmann, Samuel %A Tugaut, Julian %T Self-stabilizing processes: uniqueness problem for stationary measures and convergence rate in the small-noise limit %J ESAIM: Probability and Statistics %D 2012 %P 277-305 %V 16 %I EDP-Sciences %U http://archive.numdam.org/articles/10.1051/ps/2011152/ %R 10.1051/ps/2011152 %G en %F PS_2012__16__277_0

Herrmann, Samuel; Tugaut, Julian. Self-stabilizing processes: uniqueness problem for stationary measures and convergence rate in the small-noise limit. ESAIM: Probability and Statistics, Volume 16 (2012), pp. 277-305. doi : 10.1051/ps/2011152. http://archive.numdam.org/articles/10.1051/ps/2011152/

[1] Nonlinear self-stabilizing processes. I. Existence, invariant probability, propagation of chaos. Stoc. Proc. Appl. 75 (1998) 173-201. | MR | Zbl

, , and ,[2] Nonlinear self-stabilizing processes. II. Convergence to invariant probability. Stoc. Proc. Appl. 75 (1998) 203-224. | MR | Zbl

, and ,[3] Probabilistic approach for granular media equations in the non-uniformly convex case. Probab. Theory Relat. Fields 140 (2008) 19-40. | MR | Zbl

, and ,[4] A certain class of diffusion processes associated with nonlinear parabolic equations. Z. Wahrsch. Verw. Gebiete 67 (1984) 331-348. | MR | Zbl

,[5] Non-uniqueness of stationary measures for self-stabilizing processes. Stoc. Proc. Appl. 120 (2010) 1215-1246. | MR | Zbl

and ,[6] Stationary measures for self-stabilizing processes : asymptotic analysis in the small noise limit. Electron. J. Probab. 15 (2010) 2087-2116. | MR | Zbl

and ,[7] Large deviations and a Kramers' type law for self-stabilizing diffusions. Ann. Appl. Probab. 18 (2008) 1379-1423. | MR | Zbl

, and ,[8] Logarithmic Sobolev inequalities for some nonlinear PDE's. Stoc. Proc. Appl. 95 (2001) 109-132. | MR | Zbl

,[9] A class of Markov processes associated with nonlinear parabolic equations. Proc. Natl. Acad. Sci. USA 56 (1966) 1907-1911. | MR | Zbl

,[10] Topics in propagation of chaos, in École d'Été de Probabilités de Saint-Flour XIX-1989, Springer, Berlin. Lect. Notes Math. 1464 (1991) 165-251. | MR | Zbl

,[11] Y. Tamura, on asymptotic behaviors of the solution of a nonlinear diffusion equation. J. Fac. Sci. Univ. Tokyo Sect. IA Math. 31 (1984) 195-221. | MR | Zbl

[12] Free energy and the convergence of distributions of diffusion processes of McKean type. J. Fac. Sci. Univ. Tokyo Sect. IA Math. 34 (1987) 443-484. | MR | Zbl

,[13] On ergodic measures for McKean-Vlasov stochastic equations. Monte Carlo and Quasi-Monte Carlo Methods 2004 (2006) 471-486. | MR | Zbl

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