Continuous-variable spatial entanglement for bright optical beams

Magnus T. L. Hsu, Warwick P. Bowen, Nicolas Treps, and Ping Koy Lam
Phys. Rev. A 72, 013802 – Published 5 July 2005

Abstract

A light beam is said to be position squeezed if its position can be determined to an accuracy beyond the standard quantum limit. We identify the position and momentum observables for bright optical beams and show that position and momentum entanglement can be generated by interfering two position, or momentum, squeezed beams on a beam splitter. The position and momentum measurements of these beams can be performed using a homodyne detector with local oscillator of an appropriate transverse beam profile. We compare this form of spatial entanglement with split detection-based spatial entanglement.

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  • Received 24 January 2005

DOI:https://doi.org/10.1103/PhysRevA.72.013802

©2005 American Physical Society

Authors & Affiliations

Magnus T. L. Hsu1, Warwick P. Bowen1,*, Nicolas Treps2, and Ping Koy Lam1,†

  • 1Australian Centre for Quantum-Atom Optics, Department of Physics, Australian National University, ACT 0200, Australia
  • 2Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Case 74, 75252 Paris cedex 05, France

  • *Present address: Quantum Optics Group, MC 12-33, Norman Bridge Laboratory of Physics, California Institute of Technology, Pasadena, CA 91125, USA.
  • Email address: ping.lam@anu.edu.au

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Vol. 72, Iss. 1 — July 2005

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