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dc.contributor.authorDenning, Emil Ven
dc.contributor.authorGangloff, Dorianen
dc.contributor.authorAtatüre, Meteen
dc.contributor.authorMørk, Jesperen
dc.contributor.authorLe Gall, Claireen
dc.date.accessioned2019-10-21T23:30:30Z
dc.date.available2019-10-21T23:30:30Z
dc.identifier.issn0031-9007
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/297955
dc.description.abstractCoupling a qubit coherently to an ensemble is the basis for collective quantum memories. A single driven electron in a quantum dot can deterministically excite low-energy collective modes of a nuclear spin ensemble in the presence of lattice strain. We propose to gate a quantum state transfer between this central electron and these low-energy excitations—spin waves—in the presence of a strong magnetic field, where the nuclear coherence time is long. We develop a microscopic theory capable of calculating the exact time evolution of the strained electron-nuclear system. With this, we evaluate the operation of quantum state storage and show that fidelities up to 90% can be reached with a modest nuclear polarization of only 50%. These findings demonstrate that strain-enabled nuclear spin waves are a highly suitable candidate for quantum memory.
dc.description.sponsorshipWe thank E. Chekhovich for helpful discussions. This work was supported by the ERC PHOENICS grant (617985), the EPSRC Quantum Technology Hub NQIT (EP/M013243/1), and the Royal Society (RGF/EA/181068). D. A. G. acknowledges support from St. John’s College Title A Fellowship. E. V. D. and J. M. acknowledge funding from the Danish Council for Independent Research (Grant No. DFF-4181-00416). C. L. G. acknowledges support from a Royal Society Dorothy Hodgkin Fellowship.
dc.languageenen
dc.publisherAmerican Physical Society (APS)
dc.rightsAll rights reserved
dc.rights.uri
dc.titleCollective Quantum Memory Activated by a Driven Central Spinen
dc.typeArticle
prism.issueIdentifier14en
prism.number140502en
prism.publicationNamePhysical Review Lettersen
prism.volume123en
dc.identifier.doi10.17863/CAM.45009
rioxxterms.versionofrecord10.1103/physrevlett.123.140502en
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
dc.contributor.orcidGangloff, Dorian [0000-0002-7100-0847]
dc.contributor.orcidLe Gall, Claire [0000-0002-8980-9628]
dc.identifier.eissn1079-7114
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idUNIVERSITY OF OXFORD (FB EPSRC) (EP/M013243/1)
pubs.funder-project-idRoyal Society (DHF\R1\180124)
pubs.funder-project-idRoyal Society (RGF\EA\181068)
cam.issuedOnline2019-10-02en


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