Patent ID: 8970844
Filing Date: 2015-03-03
Classification: B82Y,G01B,G02F,G06N

Abstract:
1. A signal amplifier via a triple Mach-Zehnder interferometer (MZI) apparatus for determining intensity distribution at an output port by a photon source, said MZI apparatus comprising: first, second, third and fourth beam-splitters disposed co-linearly in parallel between the source and first and second ports; first, second, third, fourth, fifth and sixth mirrors, said first, third and fifth mirrors disposed co-linearly in parallel and displaced from said beam-splitters along a first direction, said second, fourth and sixth mirrors disposed co-linearly in parallel and displaced from said beam-splitters along a second direction; a first path projector for conducting a first weak measurement of a first photon occupation number, said first path projector being disposed between said second beam-splitter and said third mirror effectively responsive to displacing said third mirror away from said fourth mirror; and a second path projector for conducting a second weak measurement of a second photon occupation number, said second path projector being disposed between said second beam-splitter and said fourth mirror effectively responsive to displacing said fourth mirror away from said third mirror, wherein the output port is disposed beyond said fourth beam-splitter in said first direction, and the intensity distribution at the output port is positive in response to one of said first measurement being positive and said second measurement being negative.