Entangled coherent states

Barry C. Sanders
Phys. Rev. A 45, 6811 – Published 1 May 1992; Erratum Phys. Rev. A 46, 2966 (1992)
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Abstract

The nonlinear Mach-Zehnder interferometer is presented as a device whereby a pair of coherent states can be transformed into an entangled superposition of coherent states for which the notion of entanglement is generalized to include nonorthogonal, but distinct, component states. Each mode is directed to a homodyne detector. We show that there exist nonclassical intensity correlations at the output ports of the homodyne detectors which facilitate a test of local realism. In contradistinction to previous optical schemes which test local realism, the initial state used here possesses a positive Glauber-Sudarshan representation and is therefore a semiclassical state. The nonlinearity itself is responsible for generating the nonclassical state.

  • Received 8 October 1991

DOI:https://doi.org/10.1103/PhysRevA.45.6811

©1992 American Physical Society

Erratum

Erratum: Entangled coherent states [Phys. Rev. A 45, 6811 (1992)]

Barry C. Sanders
Phys. Rev. A 46, 2966 (1992)

Authors & Affiliations

Barry C. Sanders

  • School of Mathematics, Physics, Computing and Electronics, Macquarie University, New South Wales 2109, Australia

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Issue

Vol. 45, Iss. 9 — May 1992

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