A Gilchrist et al 2004 J. Opt. B: Quantum Semiclass. Opt. 6 S828 doi:10.1088/1464-4266/6/8/032
A Gilchrist1, Kae Nemoto2, W J Munro3, T C Ralph1, S Glancy4, Samuel L Braunstein5 and G J Milburn1
Show affiliationsWe outline a toolbox comprised of passive optical elements, single photon detection and superpositions of coherent states (Schrödinger cat states). Such a toolbox is a powerful collection of primitives for quantum information processing tasks. We illustrate its use by outlining a proposal for universal quantum computation. We utilize this toolbox for quantum metrology applications, for instance weak force measurements and precise phase estimation. We show in both these cases that a sensitivity at the Heisenberg limit is achievable.
42.50.Dv Quantum state engineering and measurements
42.50.Xa Optical tests of quantum theory
03.67.Lx Quantum computation architectures and implementations
Issue 8 (August 2004)
Received 15 November 2003, accepted for publication 17 February 2004
Published 27 July 2004
A Gilchrist et al 2004 J. Opt. B: Quantum Semiclass. Opt. 6 S828
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