title: Billiard with a handle.
abstract: We consider an open billiard with two holes, connected by a handle. The central billiard is chosen so that its closed form's islands of stability occupy a significant part of the phase space. Holes destroy these islands, which leads to almost all trajectories of the system being interleaved. We also study the unbalanced flow of billiard particles through the handle, which appears only after a small border site of nonspecular reflection is added to the system. With this site our system is rather a ratchet of a different type, since the site does not produce an explicitly acting force or violate the reversibility of trajectories.
authors.affiliation: Institute for Single Crystals, NAS Ukraine, 60 Nauky Ave., Kharkov, 61001, Ukraine.
authors.forename: D M
authors.initials: DM
authors.lastname: Naplekov
authors.affiliation: Institute for Single Crystals, NAS Ukraine, 60 Nauky Ave., Kharkov, 61001, Ukraine.|V. N. Karazin Kharkiv National University, 4 Svobody Square, Kharkiv 61022, Ukraine.
authors.forename: V V
authors.initials: VV
authors.lastname: Yanovsky