Regensburg 2013 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 42: Quantum Coherence, Quantum Information Systems 2

TT 42.3: Vortrag

Mittwoch, 13. März 2013, 15:30–15:45, H18

Tunable Coupling between Two Resonators Controlled by a Flux Qubit: the Quantum Switch — •E. Hoffmann¹, M. Haeberlein¹, A. Baust¹, M. Schwarz¹, E.P. Menzel¹, H. Huebl¹, David Zueco², J.-J. García Ripoll³, E. Solano⁴, F. Deppe¹, A. Marx¹, and R. Gross¹ — ¹TU München, Garching and Walther-Meißner-Institut, Germany — ²CSIC-Universidad de Zaragoza, Spain — ³IFF-CSIC, Madrid, Spain — ⁴Universidad del Pais Vasco UPV/EHU and Ikerbasque, Spain

Superconducting quantum circuits have developed into a promising platform for quantum information processing. To this end, systems consisting of a few qubits and/or harmonic oscillator circuits have been investigated. When scaling up these systems, elements allowing for a controlled coupling/decoupling of circuit parts are mandatory. A possible implementation of such an element is the Quantum Switch, where a controllable coupling between two superconducting transmission line resonators is mediated by a superconducting flux qubit. In this presentation, the experimental characterization of such a device and spectroscopic evidence for the switching behavior will be discussed.

This work is supported by DFG via SFB 631, the German Excellence Initiative via NIM, as well as EU projects CCQED, PROMISCE and SOLID, the Basque Foundation for Science, Basque Government IT472-10, Spanish MICINN FIS2009-12773-C02-01, and DZ granted by ARAID