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==Photonic logic==
[[File:optical-NOT-gate-int.svg|thumb|right|Realization of a photonic [[controlled-NOT gate]] for use in quantum computing]]
Photonic logic is the use of photons ([[light]]) in [[logic gate]]s (NOT, AND, OR, NAND, NOR, XOR, XNOR). Switching is obtained using [[nonlinear optics|nonlinear optical effect]]s when two or more signals are combined.<ref name=jainprattpatent />
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