  We report a compact, scalable, quantum photonic integrated circuit realised
by combining multiple, independent InGaAs/GaAs quantum-light-emitting-diodes
(QLEDs) with a silicon oxynitride waveguide circuit. Each waveguide joining the
circuit can then be excited by a separate, independently electrically contacted
QLED. We show that the emission from neighbouring QLEDs can be independently
tuned to degeneracy using the Stark Effect and that the resulting photon
streams are indistinguishable. This enables on-chip Hong-Ou-Mandel-type
interference, as required for many photonic quantum information processing
schemes.
