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dc.contributor.authorPaz-Silva, Gerardo A
dc.contributor.authorNorris, Leigh M
dc.contributor.authorBeaudoin, Felix
dc.contributor.authorViola, Lorenza
dc.date.accessioned2021-10-19T04:15:57Z
dc.date.available2021-10-19T04:15:57Z
dc.date.issued2019
dc.identifier.issn2469-9926
dc.identifier.doi10.1103/PhysRevA.100.042334
dc.identifier.urihttp://hdl.handle.net/10072/409277
dc.description.abstractWe show how to achieve full spectral characterization of general multiaxis additive noise on a single qubit, including arbitrary cross-axis noise correlations. Our pulsed spectral estimation technique is based on sequence repetition and frequency-comb sampling and is applicable in principle even to models where a large qubit energy splitting is present, as long as the noise is stationary and a second-order (Gaussian) approximation to the controlled reduced dynamics is viable. A key innovation in our approach is a spherical representation of the noise in terms of operators that couple directly to raising and lowering qubit operators, which is instrumental to show that only three suitably defined spectra effectively contribute in the large-splitting regime. Our result is crucial to extend the applicability of comb-based spectral estimation, which has been so far employed under the assumption of dephasing-dominated dynamics, to experimental platforms where both T1 and T2 processes may occur on comparable timescales or be otherwise significant, such as superconducting qubits.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherAMER PHYSICAL SOC
dc.relation.ispartofissue4
dc.relation.ispartofjournalPhysical Review A
dc.relation.ispartofvolume100
dc.subject.fieldofresearchPhysical sciences
dc.subject.fieldofresearchcode51
dc.subject.keywordsScience & Technology
dc.subject.keywordsPhysical Sciences
dc.subject.keywordsOptics
dc.subject.keywordsPhysics, Atomic, Molecular & Chemical
dc.subject.keywordsPhysics
dc.titleExtending comb-based spectral estimation to multiaxis quantum noise
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationPaz-Silva, GA; Norris, LM; Beaudoin, F; Viola, L, Extending comb-based spectral estimation to multiaxis quantum noise, Physical Review A, 2019, 100 (4)
dc.date.updated2021-10-19T04:14:42Z
gro.hasfulltextNo Full Text
gro.griffith.authorPaz Silva, Gerardo A.


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