Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 5: Transport: Quantum Coherence and Quantum Information Systems - Experiment

TT 5.1: Talk

Monday, March 31, 2014, 09:30–09:45, HSZ 204

Coplanar microwave resonators for superconductor/cold atom hybrid devices — •Daniel Bothner, Martin Knufinke, Benedikt Ferdinand, Dominik Wiedmaier, Vasily Fedorov, Helge Hattermann, Patrizia Weiss, Lörinc Sárkány, József Fortágh, Dieter Koelle, and Reinhold Kleiner — Physikalisches Institut and Center for Collective Quantum Phenomena in LISA⁺, Universität Tübingen, Germany

The realization of a hybrid quantum system consisting of a superconducting on-chip microwave resonator and an ultracold paramagnetic atomic ensemble poses severe challenges regarding the design and optimization of the superconducting chip. The resonators have to be integrated with atom trapping wires nearby, they are not allowed to add strong perturbations to the magnetic trapping fields and extra resonator losses due to Abrikosov vortices must be avoided or minimized. Moreover, the resonators should be magnetic field insensitively tunable and optical access to the chip surface has to be granted. In the presentation, we will elucidate these experimental boundary conditions and present strategies to comply with them on the way towards strong coupling between ultracold atomic ensembles and on-chip microwave resonators.