CMOS-based cryogenic control of silicon quantum circuits

CMOS-based cryogenic control of silicon quantum circuits

Xue, X. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
Patra, B (TU Delft QCD/Sebastiano Lab; TU Delft Quantum & Computer Engineering; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
van Dijk, J.P.G. (TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
Samkharadze, Nodar (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; TNO)
Corna, A. (TU Delft QCD/Vandersypen Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
Paquelet Wuetz, B. (TU Delft QCD/Scappucci Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
Sammak, A. (TU Delft BUS/TNO STAFF; TU Delft QuTech Advanced Research Centre)
Scappucci, G. (TU Delft QCD/Scappucci Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
Veldhorst, M. (TU Delft QCD/Veldhorst Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
Sebastiano, F. (TU Delft Quantum Circuit Architectures and Technology; TU Delft Quantum & Computer Engineering; TU Delft QuTech Advanced Research Centre)
Babaie, M. (TU Delft Electronics; TU Delft Quantum & Computer Engineering; TU Delft QuTech Advanced Research Centre)
Charbon-Iwasaki-Charbon, E. (TU Delft Quantum Circuit Architectures and Technology; TU Delft QCD/Sebastiano Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft; Intel Labs; Swiss Federal Institute of Technology)
Vandersypen, L.M.K. (TU Delft QuTech Advanced Research Centre; TU Delft QN/Vandersypen Lab; Kavli institute of nanoscience Delft; Intel Labs)

Quantum & Computer Engineering

2021

The most promising quantum algorithms require quantum processors that host millions of quantum bits when targeting practical applications¹. A key challenge towards large-scale quantum computation is the interconnect complexity. In current solid-state qubit implementations, an important interconnect bottleneck appears between the quantum chip in a dilution refrigerator and the room-temperature electronics. Advanced lithography supports the fabrication of both control electronics and qubits in silicon using technology compatible with complementary metal oxide semiconductors (CMOS)². When the electronics are designed to operate at cryogenic temperatures, they can ultimately be integrated with the qubits on the same die or package, overcoming the ‘wiring bottleneck’^3–6. Here we report a cryogenic CMOS control chip operating at 3 kelvin, which outputs tailored microwave bursts to drive silicon quantum bits cooled to 20 millikelvin. We first benchmark the control chip and find an electrical performance consistent with qubit operations of 99.99 per cent fidelity, assuming ideal qubits. Next, we use it to coherently control actual qubits encoded in the spin of single electrons confined in silicon quantum dots^7–9 and find that the cryogenic control chip achieves the same fidelity as commercial instruments at room temperature. Furthermore, we demonstrate the capabilities of the control chip by programming a number of benchmarking protocols, as well as the Deutsch–Josza algorithm¹⁰, on a two-qubit quantum processor. These results open up the way towards a fully integrated, scalable silicon-based quantum computer.

http://resolver.tudelft.nl/uuid:1ee598a4-6c3a-4419-a666-ee6d9c8fc7bf

https://doi.org/10.1038/s41586-021-03469-4

2021-11-12

0028-0836

Nature: international weekly journal of science, 593 (7858), 205-210

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2021 X. Xue, B Patra, J.P.G. van Dijk, Nodar Samkharadze, A. Corna, B. Paquelet Wuetz, A. Sammak, G. Scappucci, M. Veldhorst, F. Sebastiano, M. Babaie, E. Charbon-Iwasaki-Charbon, L.M.K. Vandersypen