Concatenated continuous driving of silicon qubit by amplitude and phase modulation

Quantum Physics arXiv:2601.11245 (quant-ph) [Submitted on 16 Jan 2026] Title:Concatenated continuous driving of silicon qubit by amplitude and phase modulation Authors:Takuma Kuno, Takeru Utsugi, Andrew J. Ramsay, Normann Mertig, Noriyuki Lee, Itaru Yanagi, Toshiyuki Mine, Nobuhiro Kusuno, Hideo Arimoto, Sofie Beyne, Julien Jussot, Stefan Kubicek, Yann Canvel, Clement Godfrin, Bart Raes, Yosuke Shimura, Roger Loo, Sylvain Baudot, Danny Wan, Kristiaan De Greve, Shinichi Saito, Digh Hisamoto, Ryuta Tsuchiya, Tetsuo Kodera, Hiroyuki Mizuno View a PDF of the paper titled Concatenated continuous driving of silicon qubit by amplitude and phase modulation, by Takuma Kuno and 24 other authors View PDF HTML (experimental) Abstract:The rate of coherence loss is lower for a qubit under Rabi drive compared to a freely evolving qubit, $T_{2}^{\rm{Rabi}}>T_{2}^*$. Building on this principle, concatenated continuous driving (CCD) keeps the qubit under continuous drive to suppress noise and manipulate dressed states by either phase or amplitude modulation. In this work, we propose a new variant of CCD which simultaneously modulates both the amplitude and phase of the driving field to generate a circularly-polarized field in the rotating frame of the carrier frequency. This circular-modulated (CM)-CCD cancels the counter-rotating term in the second rotating frame, eliminating a systematic pulse-area error that arises from an imperfect rotating wave approximation for fast gates. Numerical simulations demonstrate that the proposed CMCCD achieves higher gate fidelity than conventional CCD schemes. We further implement and compare different CCD protocols using an electron spin-qubit in an isotopically purified $^{28}$Si-MOS quantum dot and evaluate its robustness by applying static detuning and Rabi frequency errors. The robustness is significantly improved compared to standard Rabi-drive, showing the effectiveness of this scheme for qubit arrays with variation in qubit frequency, coupling to Rabi drive, and low frequency noise. The proposed scheme can be applied to various physical systems, including trapped atoms, cold atoms, superconducting qubits, and NV-centers. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2601.11245 [quant-ph] (or arXiv:2601.11245v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2601.11245 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Takuma Kuno [view email] [v1] Fri, 16 Jan 2026 12:45:50 UTC (4,042 KB) Full-text links: Access Paper: View a PDF of the paper titled Concatenated continuous driving of silicon qubit by amplitude and phase modulation, by Takuma Kuno and 24 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-01 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv (What is alphaXiv?) Links to Code Toggle CatalyzeX Code Finder for Papers (What is CatalyzeX?) DagsHub Toggle DagsHub (What is DagsHub?) GotitPub Toggle Gotit.pub (What is GotitPub?) Huggingface Toggle Hugging Face (What is Huggingface?) Links to Code Toggle Papers with Code (What is Papers with Code?) ScienceCast Toggle ScienceCast (What is ScienceCast?) Demos Demos Replicate Toggle Replicate (What is Replicate?) Spaces Toggle Hugging Face Spaces (What is Spaces?) Spaces Toggle TXYZ.AI (What is TXYZ.AI?) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower (What are Influence Flowers?) Core recommender toggle CORE Recommender (What is CORE?) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs. Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)