Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 58: Transport: Poster Session

TT 58.15: Poster

Mittwoch, 9. März 2016, 15:00–18:30, Poster D

Multiple transmon qubits manipulation and readout through a shared coplanar waveguide resonator — •Ping Yang¹, Jochen Braumülle¹, Andre Schneider¹, Lukas Grünhaupt¹, Lucas Radtke¹, Sebastian Skacel¹, Kirill Shulga², Alexey V. Ustinov^1,2, and Martin Weides^1,3 — ¹Physikalisches Institut, KIT, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany — ²Russian Quantum Center, Moscow region 143025, Russia and National University of Science and Technology MISIS, Moscow 119049, Russia — ³Materials Science in Mainz, Johannes Gutenberg-Universität Mainz, 55128 Mainz

Superconducting quantum bits (qubits) have attracted significant attention because of their applications for quantum information processing. In order to explore the scalability of superconducting qubits and their collective behavior, we investigate a quantum register formed by up to 8 transmon qubits which could all be manipulated and read out at the same time through a mutual coplanar waveguide resonator. Every qubit is designed to be tunable in frequency and has its own local bias flux. In this way, individual qubits could be either tuned into resonance with the resonator or with each other to allow information exchange, or far detuned to preserve their quantum state. Samples are designed and fabricated in our lab employing electron beam lithography and optical lithography, and then measured in the dilution refrigerator at 20 mK.