Quantum correlated light beams and sub-Poissonian electrical partition noise in parallel and series coupled semiconductor light emitters

Abstract

Quantum correlated twin beams have been generated using series and parallel coupled light emitting diodes. Furthermore, sub-Poissonian light, with a noise level 1.4 dB below the standard quatnum limit, has been measured in both circuits. From the parallel coupled setup it could be deduced that electrical partition noise may be made negligible.