Sub-shot-noise manipulation of light using semiconductor emitters and receivers

Jean-François Roch (1) , Jean-Philippe Poizat (1) , Philippe Grangier (1)

1 Laboratoire Charles Fabry de l'Institut d'Optique / Optique quantique

We describe an amplifying system using a photodiode and a light emitting diode, which is able to measure and to ''recreate'' the quantum statistics of the intensity of a light beam. This system acts therefore as a nonclassical ''quantum optical repeater.'' The overall information transfer is improved by a factor of 1.8 compared to a classical device, while the ideal quantum value would be 2, and the correlation between the signal and meter outputs is 1.2 dB below the shot-noise limit. We also demonstrate the use of this device for both detecting and recreating an input squeezed state.

Domains: Quantum Physics [quant-ph]

Jean-François Roch, Jean-Philippe Poizat, Philippe Grangier. Sub-shot-noise manipulation of light using semiconductor emitters and receivers. Physical Review Letters, 1993, 71, pp.2006-2009. ⟨10.1103/PhysRevLett.71.2006⟩. ⟨hal-00558952⟩