  Here we demonstrate quantum interference of photons on a Silicon chip
produced from a single ring resonator photon source. The source is seamlessly
integrated with a Mach-Zehnder interferometer, which path entangles degenerate
bi-photons produced via spontaneous four wave mixing in the Silicon ring
resonator. The resulting bi-photon N00N state is controlled by varying the
relative phase of the integrated Mach-Zehnder interferometer, resulting in high
two-photon interference visibilities of V~96%. Furthermore, we show that the
interference can be produced using pump wavelengths tuned to all of the ring
resonances accessible with our tunable lasers (C+L band). This work is a key
demonstration towards the simplified integration of multiple photon sources and
quantum circuits together on a monolithic chip, in turn, enabling quantum
information chips with much greater complexity and functionality.
