Generation and application of multi-path cat states of light
Natsuko Ishida, Yukihiro Ota, Y. Yamamoto · New Journal of Physics · 2009
A new scheme to generate a multi-path cat state of light, in which N photons are propagating in N different paths as a photonic macro-molecule, is proposed. Starting with N indistinguishable single-photon sources and using linear optical circuits, the target state is extracted with high fidelity. If a state preserving quantum non-demolition measurement of photon number can be incorporated into the generation scheme, the fidelity is further improved.