  Quantum Information Processing, from cryptography to computation, based upon
linear quantum optical circuit elements relies heavily on the ability offered
by the Hong-Ou-Mandel (HOM) Effect to route photons from separate input modes
into one of two common output modes. Specifically, the HOM Effect accomplishes
the path entanglement of two photons at a time such that no coincidences are
observed in the output modes of a system exhibiting the effect. In this paper,
we prove in principle that a significant increase in the robustness of the HOM
Effect can be accomplished in a scalable, readily manufactured nanophotonic
system comprised of two waveguides coupled, on chip, to a ring resonator. We
show that by operating such a device properly, one can conditionally bunch
coincident input photons in a way that is far more robust and controllable than
possible with an ordinary balanced beam splitter.
