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Updated: Jun 24, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Quadrature measurements of a bright squeezed state via sideband swapping
Jessica Schneider1, Oliver Glöckl, Gerd Leuchs
1Max Planck Institute for the Science of Light, Günther Scharowskystrasse 1, 91058 Erlangen, Germany.
Abstract:
The measurement of an arbitrary quadrature of a bright quantum state of light is a commonly requested action in many quantum information protocols, but it is experimentally challenging with previously proposed schemes. We suggest that the quadrature be measured at a specific sideband frequency of a bright quantum state by transferring the sideband modes under interrogation to a vacuum state and subsequently measuring the quadrature via homodyne detection. The scheme is implemented experimentally, and it is successfully tested with a bright squeezed state of light.
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