Regensburg 2019 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 40: Superconductivity: Qubits 1
TT 40.11: Vortrag
Mittwoch, 3. April 2019, 12:15–12:30, H48
Quantum Feedback Experiments with an FPGA-based Platform — •Richard Gebauer1, Nick Karcher1, Oliver Sander1, Martin Weides2,3, Alexey V. Ustinov2,4, and Marc Weber1 — 1Institute for Data Processing and Electronics, KIT, Karlsruhe, Germany — 2Physikalisches Institut, KIT, Karlsruhe, Germany — 3School of Engineering, University of Glasgow, Glasgow, United Kingdom — 4Russian Quantum Center, National University of Science and Technology MISIS, Moscow, Russia
A typical measurement setup for superconducting qubits consists of arbitrary waveform generators, signal recorders, and vector network analyzers. Although sufficient for simple experiments, this approach is limited due to long communication delays, poor scalability, and static pulse sequences. A faster, more integrated and more flexible solution for qubit readout and control is FPGA-based custom hardware. It not only reduces costs and space requirements but also simplifies measurements and enables many-qubit experiments as well as advanced control schemes like quantum feedback where a low response time is critical.
We developed a flexible FPGA-based integrated platform to control and read out superconducting qubits which also enables fast feedback loops to manipulate qubits depending on their measured state. The platform allows arbitrary X and Y rotations around the Bloch sphere and enables the user to perform all standard measurements needed for single qubit characterization. We will give a short overview about the platform features and capabilities. Furthermore, we present different experimental applications including results on quantum feedback.