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Elementary gates for quantum information with superposed coherent states

Source: Phys. Rev. A 82, 014304 (2010); doi:10.1103/PhysRevA.82.014304

Published 27 July 2010

PACS
  • 03.67.Lx
    Quantum computation architectures and implementations
  • 42.50.Xa
    Optical tests of quantum theory
  • YEAR: 2010
PUBLICATION DATA
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Petr Marek and Jaromír Fiurášek
Department of Optics, Palacký University, 17. Listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic
We propose an alternative way of implementing several elementary quantum gates for qubits in the coherent-state basis. The operations are probabilistic and employ single-photon subtractions as the driving force. Our schemes for single-qubit phase gate and two-qubit controlled phase gate are capable of achieving arbitrarily large phase shifts with currently available resources, which makes them suitable for the near-future tests of quantum-information processing with superposed coherent states. ©2010 The American Physical Society
History: Received 30 April 2010; published 27 July 2010
Permalink: http://link.aps.org/abstract/PRA/v82/e014304
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