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Experimentally realizable quantum comparison of coherent states and its applications

Andersson, Erika and Curty, Marcos and Jex, Igor (2006) Experimentally realizable quantum comparison of coherent states and its applications. Physical Review A, 74 (2). 022304-1. ISSN 1050-2947

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    Abstract

    When comparing quantum states to each other, it is possible to obtain an unambiguous answer, indicating that the states are definitely different, already after a single measurement. In this paper we investigate comparison of coherent states, which is the simplest example of quantum state comparison for continuous variables. The method we present has a high success probability, and is experimentally feasible to realize as the only required components are beam splitters and photon detectors. An easily realizable method for quantum state comparison could be important for real applications. As examples of such applications we present a "lock and key" scheme and a simple scheme for quantum public key distribution.

    Item type: Article
    ID code: 6195
    Keywords: quantum, beam splitter, photons, quantum state, quantum physics, Optics. Light, Atomic and Molecular Physics, and Optics
    Subjects: Science > Physics > Optics. Light
    Department: Faculty of Science > Physics
    Related URLs:
    Depositing user: Miss Darcy Spiller
    Date Deposited: 02 Jun 2008
    Last modified: 05 Sep 2014 00:05
    URI: http://strathprints.strath.ac.uk/id/eprint/6195

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