Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 52: Quantum Impurities and Kondo Physics
TT 52.1: Vortrag
Donnerstag, 4. April 2019, 09:30–09:45, H7
Drag of quantum impurities — •Falko Pientka1,2, Ovidiu Cotlet3, Richard Schmidt2,4, Gergely Zarand5, Eugene Demler2, and Atac Imamoglu3 — 1Max Planck Institute for the Physics of Complex Systems, Dresden, Germany — 2Department of Physics, Harvard University, Cambridge, Massachusetts, USA — 3Institute of Quantum Electronics, ETH Zurich, Zurich, Switzerland — 4Max Planck Institute of Quantum Optics, Garching, Germany — 5Department of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, Hungary
I will discuss transport of a mobile quantum impurity immersed in a moving bath. At strong interactions, the polaronic dressing of the impurity leads to a novel drag force exerted on the impurity by the bath. This drag force is absent for classical impurities and originates from coherent scattering events.
I will highlight experimental consequences of this effect for exciton polaritons in semiconductors, where the drag force allows for the control of photons by dc electric and magnetic fields as if they were charge carriers. Finally, I will mention an experiment which has recently demonstrated polariton drag in dc electric fields.