Electronic Communications in Probability

On the relaxation rate of short chains of rotors interacting with Langevin thermostats

Noé Cuneo and Christophe Poquet

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In this short note, we consider a system of two rotors, one of which interacts with a Langevin heat bath. We show that the system relaxes to its invariant measure (steady state) no faster than a stretched exponential $\exp (-c t^{1/2})$. This indicates that the exponent $1/2$ obtained earlier by the present authors and J.-P. Eckmann for short chains of rotors is optimal.

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Electron. Commun. Probab., Volume 22 (2017), paper no. 35, 8 pp.

Received: 28 April 2016
Accepted: 23 May 2017
First available in Project Euclid: 21 June 2017

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subgeometric ergodicity chains of rotors

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Cuneo, Noé; Poquet, Christophe. On the relaxation rate of short chains of rotors interacting with Langevin thermostats. Electron. Commun. Probab. 22 (2017), paper no. 35, 8 pp. doi:10.1214/17-ECP62. https://projecteuclid.org/euclid.ecp/1498010648

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