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Maximum likelihood estimation of potential energy in interacting particle systems from single-trajectory data

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arxiv 2007.11048 v2 pith:DMX44W5Y submitted 2020-07-21 math.ST math.PRstat.MEstat.TH

Maximum likelihood estimation of potential energy in interacting particle systems from single-trajectory data

classification math.ST math.PRstat.MEstat.TH
keywords systemsparticlepotentialdatadynamicalenergyestimationinteracting
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This paper concerns the parameter estimation problem for the quadratic potential energy in interacting particle systems from continuous-time and single-trajectory data. Even though such dynamical systems are high-dimensional, we show that the vanilla maximum likelihood estimator (without regularization) is able to estimate the interaction potential parameter with optimal rate of convergence simultaneously in mean-field limit and in long-time dynamics. This to some extend avoids the curse-of-dimensionality for estimating large dynamical systems under symmetry of the particle interaction.

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