Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 30: Superconductivity - Poster Session

TT 30.54: Poster

Monday, March 31, 2014, 15:00–19:00, P2

Time and Frequency Domain Characterization of the Superconducting Quantum Switch — •A. Baust¹, E. Hoffmann^1,2, P. Eder^1,2, J. Goetz¹, M. Häberlein^1,2, M. Fischer^1,2, M.J. Schwarz¹, F. Wulschner¹, E. Xie¹, L. Zhong¹, H. Huebl¹, K. Fedorov¹, E.P. Menzel¹, F. Deppe^1,2, A. Marx¹, R. Gross^1,2, E. Solano³, D. Zueco⁴, and J.J. Garcia-Ripoll⁵ — ¹Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — ²Physik-Department, TUM, Garching, Germany — ³Universidad del Pais Vasco and IKERBASQUE, Bilbao, Spain — ⁴CSIC, Zaragoza, Spain — ⁵Universidad Complutense, Madrid, Spain

Superconducting quantum circuits with transition frequencies of a few gigahertz form a powerful toolbox for the investigation of fundamental light-matter interaction, quantum simulation, and quantum information processing. For scalable architectures, it is important to establish controllable coupling between such circuits. To this end, we investigate how a three-Josephson-junction flux qubit mediates tunable and switchable coupling between two superconducting transmission line resonators. We demonstrate the switching behaviour in both time and frequency domain. In addition, we show that ultrastrong coupling between the qubit and a resonant mode is present in our system.

This work is supported by DFG via SFB 631, the German Excellence Initiative via NIM, EU projects CCQED, PROMISCE and SCALEQIT, the Basque Foundation for Science, Basque Government IT472-10, UPV/EHU UFI 11/55 and Spanish MINECO FIS2012-36673-C03-02, FIS2011-25167, FIS2009-12773.