A Scalable Cryo-CMOS Controller for the Wideband Frequency-Multiplexed Control of Spin Qubits and Transmons
Jeroen Petrus Gerardus Van DIjk (Student TU Delft)
Bishnu Patra (TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, TU Delft - OLD QCD/Charbon Lab)
Xiao Xue (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QCD/Vandersypen Lab)
Nodar Samkharadze (TNO, TU Delft - QCD/Vandersypen Lab)
Andrea Corna (TU Delft - QuTech Advanced Research Centre, Zurich Instruments AG, TU Delft - QCD/Vandersypen Lab, Kavli institute of nanoscience Delft)
Amir Sammak (Intel Corporation, TU Delft - Business Development)
Giordano Scappucci (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QCD/Scappucci Lab)
Menno Veldhorst (TU Delft - QCD/Veldhorst Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)
Lieven M.K. Vandersypen (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QN/Vandersypen Lab)
Edoardo Charbon (Kavli institute of nanoscience Delft, École Polytechnique Fédérale de Lausanne, TU Delft - OLD QCD/Charbon Lab)
Masoud Babaie (TU Delft - QuTech Advanced Research Centre, TU Delft - Electronics, Kavli institute of nanoscience Delft)
Fabio Sebastiano (Kavli institute of nanoscience Delft, TU Delft - (OLD)Applied Quantum Architectures, TU Delft - QuTech Advanced Research Centre)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
Building a large-scale quantum computer requires the co-optimization of both the quantum bits (qubits) and their control electronics. By operating the CMOS control circuits at cryogenic temperatures (cryo-CMOS), and hence in close proximity to the cryogenic solid-state qubits, a compact quantum-computing system can be achieved, thus promising scalability to the large number of qubits required in a practical application. This work presents a cryo-CMOS microwave signal generator for frequency-multiplexed control of 4\times 32 qubits (32 qubits per RF output). A digitally intensive architecture offering full programmability of phase, amplitude, and frequency of the output microwave pulses and a wideband RF front end operating from 2 to 20 GHz allow targeting both spin qubits and transmons. The controller comprises a qubit-phase-tracking direct digital synthesis (DDS) back end for coherent qubit control and a single-sideband (SSB) RF front end optimized for minimum leakage between the qubit channels. Fabricated in Intel 22-nm FinFET technology, it achieves a 48-dB SNR and 45-dB spurious-free dynamic range (SFDR) in a 1-GHz data bandwidth when operating at 3 K, thus enabling high-fidelity qubit control. By exploiting the on-chip 4096-instruction memory, the capability to translate quantum algorithms to microwave signals has been demonstrated by coherently controlling a spin qubit at both 14 and 18 GHz.
help_outline