Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 52: Superconducting Electronics: SQUIDs, Qubits, Circuit QED, Quantum Coherence and Quantum Information Systems 2 (joint session TT/HL)

TT 52.2: Vortrag

Donnerstag, 19. März 2020, 09:45–10:00, HSZ 03

Employing a real-time processor for experiments with superconducting qubits — •Richard Gebauer1, Nick Karcher1, Alexey V. Ustinov2,3, Martin Weides2,4, Marc Weber1, and Oliver Sander11Institute for Data Processing and Electronics, KIT, Karlsruhe, Germany — 2Physikalisches Institut, KIT, Karlsruhe, Germany — 3Russian Quantum Center, National University of Science and Technology MISIS, Moscow, Russia — 4School of Engineering, University of Glasgow, Glasgow, United Kingdom

The control of superconducting quantum bits (qubits) relies on the ability to read out their state with high precision and apply custom pulses on the nanosecond timescale. As the field progresses, experiment schemes tend to get more complicated once the number of pulses increases, complex parameter changes are necessary and further data processing is needed. Conventional setups consisting of arbitrary waveform generators and digitizers connected to a measurement computer are not ideally suited to cope with this increased complexity.

A faster and more flexible solution is FPGA-based electronics. It not only dramatically reduces costs and space requirements but also simplifies measurements and enables customized control schemes like quantum feedback. Combined with a real-time processor, complex experiment flows and online data processing render possible.

We will present our platform to control and readout superconducting qubits with a focus on the real-time processing subsystem. Furthermore, we will show multiple experimental applications where the real-time processor is utilized, like evaluating correlation functions.

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