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dc.contributor.authorEconomou, Sophia E.
dc.contributor.authorClimente, Juan I.
dc.contributor.authorBadolato, Antonio
dc.contributor.authorBracker, Allan S.
dc.contributor.authorGammon, Daniel
dc.contributor.authorDoty, Matthew F.
dc.date.accessioned2013-05-06T15:39:45Z
dc.date.available2013-05-06T15:39:45Z
dc.date.issued2012
dc.identifier.issn1098-0121
dc.identifier.issn1550-235X
dc.identifier.urihttp://hdl.handle.net/10234/62589
dc.description.abstractSpins confined in quantum dots are a leading candidate for solid-state quantum bits that can be coherently controlled by optical pulses. There are, however, many challenges to developing a scalable multibit information processing device based on spins in quantum dots, including the natural inhomogeneous distribution of quantum dot energy levels, the difficulty of creating all-optical spin manipulation protocols compatible with nondestructive readout, and the substantial electron-nuclear hyperfine interaction-induced decoherence. Here, we present a scalable qubit design and device architecture based on the spin states of single holes confined in a quantum dot molecule. The quantum dot molecule qubit enables a new strategy for optical coherent control with dramatically enhanced wavelength tunability. The use of hole spins allows the suppression of decoherence via hyperfine interactions and enables coherent spin rotations using Raman transitions mediated by a hole-spin-mixed optically excited state. Because the spin mixing is present only in the optically excited state, dephasing and decoherence are strongly suppressed in the ground states that define the qubits and nondestructive readout is possible. We present the qubit and device designs and analyze the wavelength tunability and fidelity of gate operations that can be implemented using this strategy. We then present experimental and theoretical progress toward implementing this design.ca_CA
dc.format.extent13 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherAmerican Physical Societyca_CA
dc.relation.isPartOfPhysical review B, Volume 86, Issue 8, Augustca_CA
dc.rights©2012 American Physical Societyca_CA
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/*
dc.titleScalable qubit architecture based on holes in quantum dot moleculesca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.86.085319
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_CA
dc.relation.publisherVersionhttp://prb.aps.org/abstract/PRB/v86/i8/e085319ca_CA
dc.type.versioninfo:eu-repo/semantics/publishedVersionca_CA


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