Tracking spin qubit frequency variations over 912 days
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915513384304640 |
|---|---|
| author | Capannelli, Kenji Undseth, Brennan de Fuentes, Irene Fernández Raymenants, Eline Unseld, Florian K. Pietx-Casas, Oriol Philips, Stephan G. J. Mądzik, Mateusz T. Amitonov, Sergey V. Tryputen, Larysa Scappucci, Giordano Vandersypen, Lieven M. K. |
| author_facet | Capannelli, Kenji Undseth, Brennan de Fuentes, Irene Fernández Raymenants, Eline Unseld, Florian K. Pietx-Casas, Oriol Philips, Stephan G. J. Mądzik, Mateusz T. Amitonov, Sergey V. Tryputen, Larysa Scappucci, Giordano Vandersypen, Lieven M. K. |
| contents | Solid-state qubits are sensitive to their microscopic environment, causing the qubit properties to fluctuate on a wide range of timescales. The sub-Hz end of the spectrum is usually dealt with by repeated background calibrations, which bring considerable overhead. It is thus important to characterize and understand the low-frequency variations of the relevant qubit characteristics. In this study, we investigate the stability of spin qubit frequencies in the Si/SiGe quantum dot platform. We find that the calibrated qubit frequencies of a six-qubit device vary by up to $\pm 100$ MHz while performing a variety of experiments over a span of 912 days. These variations are sensitive to the precise voltage settings of the gate electrodes, however when these are kept constant to within 15 $\mathrmμ$V, the qubit frequencies vary by less than $\pm 7$ MHz over periods up to 36 days. During overnight scans, the qubit frequencies of ten qubits across two different devices show a standard deviation below 200 kHz within a 1-hour time window. The qubit frequency noise spectral density shows roughly a $1/f$ trend above $10^{-4}$ Hz and, strikingly, a steeper trend at even lower frequencies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_20990 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Tracking spin qubit frequency variations over 912 days Capannelli, Kenji Undseth, Brennan de Fuentes, Irene Fernández Raymenants, Eline Unseld, Florian K. Pietx-Casas, Oriol Philips, Stephan G. J. Mądzik, Mateusz T. Amitonov, Sergey V. Tryputen, Larysa Scappucci, Giordano Vandersypen, Lieven M. K. Mesoscale and Nanoscale Physics Quantum Physics Solid-state qubits are sensitive to their microscopic environment, causing the qubit properties to fluctuate on a wide range of timescales. The sub-Hz end of the spectrum is usually dealt with by repeated background calibrations, which bring considerable overhead. It is thus important to characterize and understand the low-frequency variations of the relevant qubit characteristics. In this study, we investigate the stability of spin qubit frequencies in the Si/SiGe quantum dot platform. We find that the calibrated qubit frequencies of a six-qubit device vary by up to $\pm 100$ MHz while performing a variety of experiments over a span of 912 days. These variations are sensitive to the precise voltage settings of the gate electrodes, however when these are kept constant to within 15 $\mathrmμ$V, the qubit frequencies vary by less than $\pm 7$ MHz over periods up to 36 days. During overnight scans, the qubit frequencies of ten qubits across two different devices show a standard deviation below 200 kHz within a 1-hour time window. The qubit frequency noise spectral density shows roughly a $1/f$ trend above $10^{-4}$ Hz and, strikingly, a steeper trend at even lower frequencies. |
| title | Tracking spin qubit frequency variations over 912 days |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2509.20990 |