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Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 13: Transport: Poster Session

TT 13.45: Poster

Monday, March 26, 2012, 15:00–19:00, Poster B

Compact superconducting coplanar microwave beam splitters — •Alexander Baust1,2, Norbert Kalb2, Max Haeberlein1,2, Jan Goetz1,2, Elisabeth Hoffmann1,2, Edwin P. Menzel1,2, Manuel J. Schwarz1,2, Friedrich Wulschner1,2, Ling Zhong1,2, Thomas Losinger2, Frank Deppe1,2, Achim Marx1,2, and Rudolf Gross1,21Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Physik-Department, TUM, Garching, Germany

The recent evolution of circuit quantum electrodynamics systems making use of standing-wave microwave modes towards setups for propagating quantum microwaves has triggered the need for low-loss superconducting microwave beam splitters. Such a device should have ports compatible with the coplanar geometry relevant for circuit QED and, at the same time, be compact allowing for scalability. This combination presents fundamental and technological challenges. In this work, we present the fabrication and characterization of various compact superconducting coplanar microwave beam splitters. In addition, we discuss efforts towards a tunable beam splitter.

This work is supported by the DFG via SFB631 and by the German Excellence Initiative via NIM.

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