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Precise Control of Entanglement in Multinuclear Spin Registers Coupled to Defects

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dc.contributor.authorTakou, Evangeliaen
dc.contributor.authorBarnes, Edwin Flemingen
dc.contributor.authorEconomou, Sophia E.en
dc.date.accessioned2023-03-28T13:07:12Zen
dc.date.available2023-03-28T13:07:12Zen
dc.date.issued2023-01-18en
dc.description.abstractMay accepted published January Quantum networks play an indispensable role in quantum information tasks such as secure communications, enhanced quantum sensing, and distributed computing. Among the most mature and promising platforms for quantum networking are nitrogen-vacancy (NV) centers in diamond and other color centers in solids. One of the challenges in using these systems for networking applications is to controllably manipulate entanglement between the electron and the nuclear spin register despite the always-on nature of the hyperfine interactions, which makes this an inherently many-body quantum system. Here, we develop a general formalism to quantify and control the generation of entanglement in an arbitrarily large nuclear spin register coupled to a color center electronic spin. We provide a reliable measure of nuclear spin selectivity, by exactly incorporating into our treatment the dynamics with unwanted nuclei. We also show how to realize direct multipartite gates through the use of dynamical decoupling sequences, drastically reducing the total gate time compared to protocols based on sequential entanglement with individual nuclear spins. We quantify the performance of such gate operations in the presence of unwanted residual entanglement links, capturing the dynamics of the entire nuclear spin register. Finally, using experimental parameters of a well-characterized 27 nuclear spin register device, we show how to prepare with high-fidelity entangled states for quantum error correction. While in this analysis we focus on a particular NV-diamond-based register, our framework is completely general and applicable to other defects in diamond and in SiC.en
dc.description.notesThe authors thank Vlad Shkolnikov, Arian Vezvaee, and Filippos Tzimkas Dakis for useful discussions. E. B. acknowledges support from National Science Foundation (NSF) Grant No. 1847078. S. E. E. acknowledges support from NSF Grant No. 1838976.en
dc.description.sponsorshipNational Science Foundation (NSF) [1847078]; NSF [1838976]en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1103/PhysRevX.13.011004en
dc.identifier.issue1en
dc.identifier.other11004en
dc.identifier.urihttp://hdl.handle.net/10919/114198en
dc.identifier.volume13en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectSolid-state spinen
dc.subjectquantum networken
dc.subjectgatesen
dc.titlePrecise Control of Entanglement in Multinuclear Spin Registers Coupled to Defectsen
dc.title.serialPhysical Review Xen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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