Regensburg 2019 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 30: Correlated Electrons: 1D Theory
TT 30.1: Talk
Tuesday, April 2, 2019, 14:00–14:15, H4
Static properties of an atomic Luttinger liquid superimposed on a linear ion chain — •Andreas B. Michelsen1,2,3, Manuel Valiente4, Nikolaj T. Zinner1,5, and Antonio Negretti6 — 1Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark — 2Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg — 3SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom — 4SUPA, Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom — 5Aarhus Institute of Advanced Studies, Aarhus University, DK-8000 Aarhus C, Denmark — 6Zentrum für Optische Quantentechnologien and The Hamburg Centre for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany
We investigate the one-dimensional physics of a linear chain of ions immersed in a Luttinger liquid (LL) of spin-polarized fermionic atoms. Such systems have recently become experimentally realizable and host an interesting interplay between atom-atom interactions and atom-ion interactions. We compute the LL parameter and the speed of sound as a function of the quantum defect parameters, the latter of which can be controlled e.g. by manipulating the ions' internal state. We find a strong dependence of the LL parameter and the speed of sound on the quantum defect parameters, enabling us to modify the static properties of the quantum liquid via external driving of the ionic impurities.