Spatial quantum correlations generated by multiple scattering of squeezed light

Peter Lodahl

The authors demonstrates that spatial quantum correlations are induced by multiple scattering of quadrature squeezed light through a random medium. As a consequence, light scattered along two different directions by the random medium will not be independent, but be correlated to an extent that can only be described by a quantum mechanical theory for multiple scattering. The spatial quantum correlation is revealed in the fluctuations of the total intensity transmission or reflection through the multiple scattering medium.

Jean-Luc Blanchet, Éric Lantz, Luca Furfaro +1 more

Stephan Smolka, Alexander Huck, Ulrik L. Andersen +2 more

We demonstrate that spatial quantum correlations are induced by multiple scattering of squeezed light. The correlation relates multiple scattered photons at different spatial positions, and is tunable by varying photon fluctuations of the illuminating beam.

Seiji Armstrong, Jiří Janoušek, Hans‐A. Bachor +1 more

Jean‐François Morizur, Seiji Armstrong, Nicolas Treps +2 more

Stephan Smolka, Alexander Huck, Ulrik L. Andersen +2 more

We present the experimental realization of spatial quantum correlations of photons that are induced by multiple scattering of squeezed light. The quantum correlation relates photons propagating along two different light paths through the random medium and is infinite in range. Both positive and negative spatial quantum correlations are observed when varying the quantum state incident to the multiple scattering medium, and the strength of the correlations is controlled by the number of photons. The experimental results are in excellent agreement with recent theoretical proposals by implementing the full quantum model of multiple scattering.