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Experimental preparation of two-photon Knill-Laflamme-Milburn states

Source: Phys. Rev. A 81, 012321 (2010); doi:10.1103/PhysRevA.81.012321

Published 22 January 2010

PACS
  • 03.67.Bg
    Entanglement production and manipulation (quantum information)
  • 42.50.Dv
    Quantum state engineering and measurements (quantum optics)
  • 42.50.Ex
    Optical implementations of quantum information processing and transfer
  • YEAR: 2010
PUBLICATION DATA
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Karel Lemr,1 Antonín Černoch,1 Jan Soubusta,1 and Jaromír Fiurášek2
1Joint Laboratory of Optics of Palacký University and Institute of Physics of Academy of Sciences of the Czech Republic, 17. listopadu 50A, 779 07 Olomouc, Czech Republic
2Department of Optics, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
We report an experimental preparation of the so-called Knill-Laflamme-Milburn states (KLM states) that have been known to have interesting properties related to quantum information processing. Our experiment has demonstrated successful preparation of entangled two-photon four-mode KLM states using spontaneous parametric down-conversion as a source of entangled photon pairs, linear optical components, and avalanche photodiodes for single-photon detection. We have verified the successful generation of KLM states by complete quantum state tomography. ©2010 The American Physical Society
History: Received 26 October 2009; published 22 January 2010
Permalink: http://link.aps.org/abstract/PRA/v81/e012321
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