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dc.contributor.authorHernández-Gómez, S.
dc.contributor.authorPoggiali, F.
dc.contributor.authorFabbri, N.
dc.contributor.authorCappellaro, Paola
dc.date.accessioned2018-12-21T20:50:19Z
dc.date.available2018-12-21T20:50:19Z
dc.date.issued2018-12
dc.date.submitted2018-08
dc.identifier.issn2469-9950
dc.identifier.issn2469-9969
dc.identifier.urihttp://hdl.handle.net/1721.1/119832
dc.description.abstractKnowing a quantum system's environment is critical for its practical use as a quantum device. Qubit sensors can reconstruct the noise spectral density of a classical bath, provided long enough coherence time. Here, we present a protocol that can unravel the characteristics of a more complex environment, comprising both unknown coherently coupled quantum systems, and a larger quantum bath that can be modeled as a classical stochastic field. We exploit the rich environment of a nitrogen-vacancy center in diamond, tuning the environment behavior with a bias magnetic field, to experimentally demonstrate our method. We show how to reconstruct the noise spectral density even when limited by relatively short coherence times, and identify the local spin environment. Importantly, we demonstrate that the reconstructed model can have predictive power, describing the spin qubit dynamics under control sequences not used for noise spectroscopy, a feature critical for building robust quantum devices. At lower bias fields, where the effects of the quantum nature of the bath are more pronounced, we find that more than a single classical noise model are needed to properly describe the spin coherence under different controls, due to the back action of the qubit onto the bath.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Grant EECS1702716)en_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevB.98.214307en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Physical Societyen_US
dc.titleNoise spectroscopy of a quantum-classical environment with a diamond qubiten_US
dc.typeArticleen_US
dc.identifier.citationHernández-Gómez, S. et al. "Noise spectroscopy of a quantum-classical environment with a diamond qubit." Physical Review B 98, 21 (December 2018: 214307 © 2018 American Physical Societyen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Nuclear Science and Engineeringen_US
dc.contributor.mitauthorCappellaro, Paola
dc.relation.journalPhysical Review Ben_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2018-12-17T18:00:28Z
dc.language.rfc3066en
dc.rights.holderAmerican Physical Society
dspace.orderedauthorsHernández-Gómez, S.; Poggiali, F.; Cappellaro, P.; Fabbri, N.en_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0003-3207-594X
mit.licensePUBLISHER_POLICYen_US


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