Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 16: Transport: Quantum Coherence and Quantum Information Systems – Experiments (jointly with HL, MA)

TT 16.1: Vortrag

Montag, 16. März 2015, 15:00–15:15, H 0110

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

Recently, it has been demonstrated that ultracold atomic clouds can show very long coherence times on the order of 10 sec in close proximity to a superconducting chip surface [1]. Due to these extraordinarily long coherence times, atomic clouds are promising candidates as long-lived quantum memory in a future hybrid quantum processor. The realization of such a fully functioning hybrid system, however, poses severe challenges regarding the design and optimization of the superconducting chip. We will briefly discuss the relevant experimental boundary conditions and present strategies to comply with them on the way towards coherent coupling between ultracold atomic ensembles and on-chip microwave resonators. We in particular focus on how mixing normal conducting and superconducting components can outperform purely superconducting chips with respect to the requirements of the aspired hybrid system.
S. Bernon et al., Nature Commun. 4, 2380 (2013)