title: Exact symmetries in the velocity fluctuations of a hot Brownian swimmer.
abstract: Symmetries constrain dynamics. We test this fundamental physical principle, experimentally and by molecular dynamics simulations, for a hot Janus swimmer operating far from thermal equilibrium. Our results establish scalar and vectorial steady-state fluctuation theorems and a thermodynamic uncertainty relation that link the fluctuating particle current to its entropy production at an effective temperature. A Markovian minimal model elucidates the underlying nonequilibrium physics.
authors.affiliation: Institut für Theoretische Physik, Universität Leipzig, Postfach 100 920, D-04009 Leipzig, Germany.
authors.forename: Gianmaria
authors.initials: G
authors.lastname: Falasco
authors.affiliation: Institut für Theoretische Physik, Universität Leipzig, Postfach 100 920, D-04009 Leipzig, Germany.
authors.forename: Richard
authors.initials: R
authors.lastname: Pfaller
authors.affiliation: Molecular Nanophotonics Group, Institute of Experimental Physics I, University of Leipzig, 04103 Leipzig, Germany.
authors.forename: Andreas P
authors.initials: AP
authors.lastname: Bregulla
authors.affiliation: Molecular Nanophotonics Group, Institute of Experimental Physics I, University of Leipzig, 04103 Leipzig, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Cichos
authors.affiliation: Institut für Theoretische Physik, Universität Leipzig, Postfach 100 920, D-04009 Leipzig, Germany.
authors.forename: Klaus
authors.initials: K
authors.lastname: Kroy