Quadrature measurements of a bright squeezed state via sideband swapping.
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.
Max Planck Institute for the Science of Light, Günther Scharowskystrasse 1, 91058 Erlangen, Germany.
Jessica
J
Schneider
Oliver
O
Glöckl
Gerd
G
Leuchs
Ulrik L
UL
Andersen