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Dispersing Billiards with Moving Scatterers |
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| Authors: | Mikko Stenlund Lai-Sang Young Hongkun Zhang |
| Affiliation: | 1. Department of Mathematics, University of Rome “Tor Vergata”, Via della Ricerca Scientifica, 00133, Roma, Italy 2. Department of Mathematics and Statistics, University of Helsinki, P. O. Box 68, Helsinki, 00014, Finland 3. Courant Institute of Mathematical Sciences, New York, NY, 10012, USA 4. Department of Mathematics & Statistics, University of Massachusetts, Amherst, 01003, USA |
| Abstract: | We propose a model of Sinai billiards with moving scatterers, in which the locations and shapes of the scatterers may change by small amounts between collisions. Our main result is the exponential loss of memory of initial data at uniform rates, and our proof consists of a coupling argument for non-stationary compositions of maps similar to classical billiard maps. This can be seen as a prototypical result on the statistical properties of time-dependent dynamical systems. |
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