Berlin 2012 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 33: Superconductivity, Measuring Devices, Matter at Low Temperature: Poster Session

TT 33.46: Poster

Mittwoch, 28. März 2012, 15:00–19:00, Poster B

Fabrication of Flux Qubits and Resonators for their Dispersive Readout — •Anastasia V. Shcherbakova¹, Kirill G. Fedorov¹, Roland Schäfer², and Alexey V. Ustinov¹ — ¹Physikalisches Institut and DFG-Centrum für Funktionelle Nanostrukturen (CFN), Karlsruher Institut für Technologie, D-76128 Karlsruhe, Germany — ²Institut für Festkörperphysik, Karlsruher Institut für Technologie, D-76344 Eggenstein-Leopoldshafen, Germany

The dispersive readout of a superconducting qubit gives the possibility to read it out without damaging the quantum state space. The idea of dispersive readout with the help of a resonator is based on the shift of the resonator frequency depending on the state of the qubit coupled to it. This work is devoted to the fabrication of flux qubits coupled to different types of resonators - linear λ/4 resonators and non-linear resonators. We will present preliminary results on measurements of superconducting quantum bits in these schemes. We are also concerned with developing a scalable readout scheme using a quantum cavity bus.