title: Topological protection of multiparticle dissipative transport.
abstract: Topological protection allows robust transport of localized phenomena such as quantum information, solitons and dislocations. The transport can be either dissipative or non-dissipative. Here, we experimentally demonstrate and theoretically explain the topologically protected dissipative motion of colloidal particles above a periodic hexagonal magnetic pattern. By driving the system with periodic modulation loops of an external and spatially homogeneous magnetic field, we achieve total control over the motion of diamagnetic and paramagnetic colloids. We can transport simultaneously and independently each type of colloid along any of the six crystallographic directions of the pattern via adiabatic or deterministic ratchet motion. Both types of motion are topologically protected. As an application, we implement an automatic topologically protected quality control of a chemical reaction between functionalized colloids. Our results are relevant to other systems with the same symmetry.
authors.affiliation: Experimentalphysik, Institutes of Physics and Mathematics, Universität Bayreuth, Universitätsstraβe 30, Bayreuth 95440, Germany.
authors.forename: Johannes
authors.initials: J
authors.lastname: Loehr
authors.affiliation: Mathematik, Institutes of Physics and Mathematics, Universität Bayreuth, Bayreuth 95440, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Loenne
authors.affiliation: Theoretische Physik, Institutes of Physics and Mathematics, Universität Bayreuth, Bayreuth 95440, Germany.
authors.forename: Adrian
authors.initials: A
authors.lastname: Ernst
authors.affiliation: Theoretische Physik, Institutes of Physics and Mathematics, Universität Bayreuth, Bayreuth 95440, Germany.
authors.forename: Daniel
authors.initials: D
authors.lastname: de Las Heras
authors.affiliation: Experimentalphysik, Institutes of Physics and Mathematics, Universität Bayreuth, Universitätsstraβe 30, Bayreuth 95440, Germany.
authors.forename: Thomas M
authors.identifier: 0000-0002-8852-6570
authors.initials: TM
authors.lastname: Fischer