Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Poster: Quantum Optics and Photonics III
Q 58.14: Poster
Donnerstag, 14. März 2019, 16:15–18:15, S Atrium Informatik
Coherence of individual neutral impurities immersed in an ultracold bath — •Daniel Adam1, Quentin Bouton1, Jennifer Koch1, Tobias Lausch1, Daniel Mayer1, Jens Nettersheim1, Felix Schmidt1, and Artur Widera1,2 — 1Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Gottlieb-Daimler-Strasse 47, 67663 Kaiserslautern, Germany
Impurities in an ultracold bath with adjustable interaction strength from a versatile system for experimentally studying fundamental quantum phenomena. A prominent question regards the quantum coherence of individual quantum bits (qubits) when coupled to various baths. Experimentally we realize such a paradigm immersing individual neutral Cs atoms into an ultracold cloud of Rb atoms.
We investigate the coherence properties of single impurity qubits in an ultracold cloud of Rb atoms. Experimental control allows preparation of arbitrary qubit states within the ground-state hyperfine manifolds. Additionally, Feshbach resonances at ultralow energies enable us to selectively tune the elastic interaction strength for internal qubit states. We trace the thermalization of the impurities on the one hand, and coherence properties of impurity superpositions on the other hand. We discuss the current state of the project unraveling the competition between thermal relaxation and decoherence.