Topological protection of multiparticle dissipative transport

Johannes Loehr, Michael Loenne, Adrian Ernst, Daniel de las Heras and Thomas M. Fischer ()
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Johannes Loehr: Experimentalphysik, Institutes of Physics and Mathematics, Universität Bayreuth, Universitätsstraβe 30
Michael Loenne: Mathematik, Institutes of Physics and Mathematics, Universität Bayreuth
Adrian Ernst: Theoretische Physik, Institutes of Physics and Mathematics, Universität Bayreuth
Daniel de las Heras: Theoretische Physik, Institutes of Physics and Mathematics, Universität Bayreuth
Thomas M. Fischer: Experimentalphysik, Institutes of Physics and Mathematics, Universität Bayreuth, Universitätsstraβe 30

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: 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.

Date: 2016
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DOI: 10.1038/ncomms11745

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