Fabio Benatti and Roberto Floreanini, of the National Institute of Nuclear Physics in Trieste, Italy, propose using atom interferometers to search for granularity.
Their basic concept is to use light to transmit the quantum information using interferometers, which are instruments that change the frequency of light waves, then recombine them to get particular effects.
Laser interferometers are looking for disturbances in their experimental set-ups that are equivalent to mere fractions of the diameter of a proton, one of the particles that make up the nucleus of an atom.