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Quasideterministic realization of a universal quantum gate in a single scattering process

Ciccarello, F and Browne, D E and Kwek, L C and Schomerus, Henning and Zarcone, M and Bose, S (2012) Quasideterministic realization of a universal quantum gate in a single scattering process. Physical Review A, 85 (5). ISSN 1050-2947

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    Abstract

    We show that a flying particle, such as an electron or a photon, scattering along a one-dimensional waveguide from a pair of static spin-1/2 centers, such as quantum dots, can implement a controlled-z gate (universal for quantum computation) between them. This occurs quasideterministically in a single scattering event, with no need for any postselection or iteration and without demanding the flying particle to bear any internal spin. We show that an easily matched hard-wall boundary condition along with the elastic nature of the process are key to such performances.

    Item Type: Article
    Journal or Publication Title: Physical Review A
    Additional Information: ©2012 American Physical Society
    Subjects: Q Science > QC Physics
    Departments: Faculty of Science and Technology > Physics
    ID Code: 54396
    Deposited By: ep_importer_pure
    Deposited On: 22 May 2012 09:10
    Refereed?: Yes
    Published?: Published
    Last Modified: 09 Apr 2014 23:29
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/54396

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