**Linear Optical Quantum Computing, Imaging, and Metrology -- What's New with N00N States?** - Jonathan Dowling

In the linear optical approach to quantum information\r\nprocessing, I will show explicitly how the projective measurement\r\nprocess induces the effective photon-photon nonlinearity required for\r\nscalable quantum computation. Such strong \"designer\" nonlinearities\r\nat the few-photon level constitutes a revolution in nonlinear optics,\r\nand can be put to work for other tasks such as imaging and metrology.