Influence of coincidence detection through free-space atmospheric turbulence using partial spatial coherence

Abstract

The development of a quantum network relies on the advances of hybrid systems which includes ground to ground communication. However, the atmospheric turbulence of the environment poses a severe challenge to the optical quantum link. In this paper, we outline a theoretical and experimental investigation of the influence of atmospheric turbulence on the coincidence detection of the entangled photon pairs using a fully and partially spatially coherent pump beam. A spatial light modulator is encoded with Kolmogorov model to mimic the atmospheric turbulence strength. The results show that the photon pairs generated using a partially spatially coherent pump are more robust towards varying atmospheric turbulence strengths than the photon pairs produced by a fully spatially coherent pump beam.

References in corpus (4)

• Satellite-to-ground quantum key distribution
• Free-Space distribution of entanglement and single photons over 144 km
• Quantum teleportation and entanglement distribution over 100-kilometre free-space channels
• The influence of pump coherence on the generation of position-momentum entanglement in down-conversion