Silicon T centre hyperfine structure and memory protection schemes
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Quantum Physics arXiv:2512.16047 (quant-ph) [Submitted on 18 Dec 2025] Title:Silicon T centre hyperfine structure and memory protection schemes Authors:Nicholas Brunelle, Joshua Kanaganayagam, Mehdi Keshavarz, Chloe Clear, Oney Soykal, Myles Ruether, Adam DeAbreu, Amirhossein AlizadehKhaledi, Yihuang Xiong, Nikolay V. Abrosimov, Geoffroy Hautier, Michael Thewalt, Stephanie Simmons, Daniel Higginbottom View a PDF of the paper titled Silicon T centre hyperfine structure and memory protection schemes, by Nicholas Brunelle and 13 other authors View PDF HTML (experimental) Abstract:Combining the long-coherence of spin qubits and the capability to transmit information and entanglement through photons, spin-photon interfaces (SPIs) are a promising platform for networked quantum computation and long-distance quantum communication. SPIs that possess local `memory' qubits in addition to the optically coupled `communication' qubit can improve remote entanglement fidelities through brokered entanglement schemes and entanglement purification. In these schemes, it is critical to protect the memory qubit from decoherence during entanglement operations on the communications qubit. Silicon, a platform with mature microelectronic and nanophotonic fabrication, is host to the T centre, an SPI with emission in the telecommunications O-band that directly integrates with silicon nanophotonics. Cavity-coupled T centres are a platform for brokered entanglement distribution in silicon photonic circuits and over long-distance optical fibre links. The T centre's electron and nuclear spin qubits are an intrinsic register of communication and memory qubits respectively, with anisotropic hyperfine coupling. In this work we determine the T centre's hydrogen hyperfine coupling tensor. We also introduce schemes to protect against dephasing or eliminate relaxation of the T centre's hydrogen memory qubit during optical excitation. These results address a key challenge for practical T centre quantum networks. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2512.16047 [quant-ph] (or arXiv:2512.16047v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2512.16047 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Nicholas Brunelle [view email] [v1] Thu, 18 Dec 2025 00:09:13 UTC (4,072 KB) Full-text links: Access Paper: View a PDF of the paper titled Silicon T centre hyperfine structure and memory protection schemes, by Nicholas Brunelle and 13 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2025-12 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?)