title: Electrically tunable artificial gauge potential for polaritons.
abstract: Neutral particles subject to artificial gauge potentials can behave as charged particles in magnetic fields. This fascinating premise has led to demonstrations of one-way waveguides, topologically protected edge states and Landau levels for photons. In ultracold neutral atoms, effective gauge fields have allowed the emulation of matter under strong magnetic fields leading to realization of Harper-Hofstadter and Haldane models. Here we show that application of perpendicular electric and magnetic fields effects a tunable artificial gauge potential for two-dimensional microcavity exciton polaritons. For verification, we perform interferometric measurements of the associated phase accumulated during coherent polariton transport. Since the gauge potential originates from the magnetoelectric Stark effect, it can be realized for photons strongly coupled to excitations in any polarizable medium. Together with strong polariton-polariton interactions and engineered polariton lattices, artificial gauge fields could play a key role in investigation of non-equilibrium dynamics of strongly correlated photons.
authors.affiliation: Institute of Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: Hyang-Tag
authors.identifier: 0000-0002-4068-2902
authors.initials: HT
authors.lastname: Lim
authors.affiliation: Institute of Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: Emre
authors.initials: E
authors.lastname: Togan
authors.affiliation: Institute of Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: Martin
authors.initials: M
authors.lastname: Kroner
authors.affiliation: Institute of Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: Javier
authors.initials: J
authors.lastname: Miguel-Sanchez
authors.affiliation: Institute of Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland.
authors.forename: Atac
authors.initials: A
authors.lastname: Imamoğlu