  A novel method of macroscopically entangled light-pair generation is
presented for a quantum laser using randomness-based deterministic phase
control of coherent light in a Mach-Zehnder interferometer (MZI). Unlike the
particle nature-based quantum correlation in conventional quantum mechanics,
the wave nature of photons is applied for collective phase control of coherent
fields, resulting in a deterministically controllable nonclassical phenomenon.
For the proof of principle, the entanglement between output light fields from
an MZI is examined using the Hong-Ou-Mandel-type anticorrelation technique,
where the anticorrelation is a direct evidence of the nonclassical features in
an interferometric scheme. For the generation of random phase bases between two
bipartite input coherent fields, a deterministic control of opposite frequency
shifts results in phase sensitive anticorrelation, which is a macroscopic
quantum feature.
