Long-Distance Spin-Spin Coupling via Floating Gates

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Long-Distance Spin-Spin Coupling via Floating Gates

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dc.contributor.author Trifunovic, Luka
dc.contributor.author Trif, Mircea
dc.contributor.author Wootton, James
dc.contributor.author Loss, Daniel
dc.contributor.author Dial, Oliver
dc.contributor.author Yacoby, Amir
dc.contributor.author Abebe, Rediet Tesfaye
dc.date.accessioned 2012-02-13T16:42:40Z
dc.date.issued 2012
dc.identifier.citation Trifunovic, Luka, Oliver Dial, Mircea Trif, James R. Wooton, Rediet Abebe, Amir Yacoby, and Daniel Loss. 2012. Long-distance spin-spin coupling via floating gates. Physical Review X 2(1): 011006. en_US
dc.identifier.issn 2160-3308 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:8157242
dc.description.abstract The electron spin is a natural two-level system that allows a qubit to be encoded. When localized in a gate-defined quantum dot, the electron spin provides a promising platform for a future functional quantum computer. The essential ingredient of any quantum computer is entanglement—for the case of electron-spin qubits considered here—commonly achieved via the exchange interaction. Nevertheless, there is an immense challenge as to how to scale the system up to include many qubits. In this paper, we propose a novel architecture of a large-scale quantum computer based on a realization of long-distance quantum gates between electron spins localized in quantum dots. The crucial ingredients of such a long-distance coupling are floating metallic gates that mediate electrostatic coupling over large distances. We show, both analytically and numerically, that distant electron spins in an array of quantum dots can be coupled selectively, with coupling strengths that are larger than the electron-spin decay and with switching times on the order of nanoseconds. en_US
dc.description.sponsorship Physics en_US
dc.language.iso en_US en_US
dc.publisher American Physical Society en_US
dc.relation.isversionof doi://10.1103/PhysRevX.2.011006 en_US
dc.relation.hasversion http://arxiv.org/abs/1110.1342v1 en_US
dash.license OAP
dc.subject nanophysics en_US
dc.subject quantum information en_US
dc.subject semiconductor physics en_US
dc.subject mesoscale and nanoscale physics en_US
dc.subject quantum physics en_US
dc.title Long-Distance Spin-Spin Coupling via Floating Gates en_US
dc.type Journal Article en_US
dc.description.version Accepted Manuscript en_US
dc.relation.journal Physical Review X en_US
dash.depositing.author Yacoby, Amir
dc.date.available 2012-02-13T16:42:40Z

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  • FAS Scholarly Articles [7262]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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