Massive parallel generation of indistinguishable single photons via   polaritonic superfluid to Mott-insulator quantum phase transition
  We propose the superfluid to Mott-insulator quantum phase transition in an array of exciton-polariton traps can be utilized for massive parallel generation of indistinguishable single photons. By means of analytical and numerical methods, the device operations and system properties are studied using realistic experimental parameters. Such a deterministic, fault-tolerant, massive parallel generation may open up a new perspective in photonic quantum information processing. 
Neil Na and Yoshihisa Yamamoto