Two-qubit cryo-CMOS control of a spin register in diamond
Abstract
Utility-scale quantum technologies will not only require a well-performing quantum platform, but also classical control hardware that is scalable, efficient, and meets the design requirements set by the quantum system of interest. One approach is the application of silicon CMOS technology, a highly scalable and mature technology, to design application-specific integrated circuits (ASIC) that are optimized for the quantum system. In this work, we present two-qubit control of electron and nuclear spins in NV centres in diamond, using a cryogenic CMOS qubit controller integrated with a diamond quantum device in a cryostat. Using Gate Set Tomography (GST) we characterize the performance of the single-qubit gates on both electron- and carbon nuclear spins, and analyze the limiting noise processes. We use dynamical decoupling to engineer a two-qubit gate, and estimate F2q,avg = 95(2)% for the electron-nuclear two-qubit gate fidelity. Our demonstration of cryo-CMOS-driven two-qubit gates is a key step towards highly-integrated quantum devices based on colour centres.
Related
- A Cryogenic Hybrid Photonic/CMOS Controller Architecture for Scalable Superconducting Qubit Control
- Experimental Benchmarking of a 256-Qubit Room-Temperature NV-Diamond Quantum Processor with an Optically Programmable Biomolecular Quantum Bus
- Resonant multi-harmonic acousto-optics for programmable frequency control of visible light in a CMOS platform
- Charge-Coupled Device-Based Arbitrary Waveform Generation for Qubit Control
- 12 nm FinFETs from 292 K to 10 mK: Characterization and a Temperature-Continuous Compact Model for Qubit Control
BibTeX
@misc{ommen2026twoqubit,
title = {{Two-qubit cryo-CMOS control of a spin register in diamond}},
author = {H. B. van Ommen and N. E. Fakkel and M. van Riggelen and J. Yun and L. A. Enthoven and M. A. B. ElBadry and F. Sebastiano and M. Babaie and T. H. Taminiau},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.26413},
eprint = {2610.26413},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.26413},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Two-qubit cryo-CMOS control of a spin register in diamond
AU - H. B. van Ommen
AU - N. E. Fakkel
AU - M. van Riggelen
AU - J. Yun
AU - L. A. Enthoven
AU - M. A. B. ElBadry
AU - F. Sebastiano
AU - M. Babaie
AU - T. H. Taminiau
PY - 2026
DA - 2026/10/19
PB - arXiv
DO - 10.48550/arxiv.2610.26413
UR - https://arxiv.org/abs/2610.26413
AB - Utility-scale quantum technologies will not only require a well-performing quantum platform, but also classical control hardware that is scalable, efficient, and meets the design requirements set by the quantum system of interest. One approach is the application of silicon CMOS technology, a highly scalable and mature technology, to design application-specific integrated circuits (ASIC) that are optimized for the quantum system. In this work, we present two-qubit control of electron and nuclear spins in NV centres in diamond, using a cryogenic CMOS qubit controller integrated with a diamond quantum device in a cryostat. Using Gate Set Tomography (GST) we characterize the performance of the single-qubit gates on both electron- and carbon nuclear spins, and analyze the limiting noise processes. We use dynamical decoupling to engineer a two-qubit gate, and estimate F_2q,avg = 95(2)% for the electron-nuclear two-qubit gate fidelity. Our demonstration of cryo-CMOS-driven two-qubit gates is a key step towards highly-integrated quantum devices based on colour centres.
ER -