1) Atom interferometry uses laser cooled atoms to create coherent atomic waves that are split and later recombined to perform extremely precise measurements. 2) Sources of error in miniaturized atom interferometers include the uncertainty in atom velocity distribution, laser decoherence, improper atomic fountain height, and transit times shorter than pulse intervals leading to non-sharp transitions. 3) Stimulated Raman transitions can be used to create a two-state atom interferometer system by applying lasers to induce transitions between momentum states via virtual excited states, allowing interference to be measured through fluorescence.