Formation of Pairing Fields in Resonantly Coupled Atomic and Molecular   Bose-Einstein Condensates
  In this paper, we show that pair-correlations may play an important role in the quantum statistical properties of a Bose-Einstein condensed gas composed of an atomic field resonantly coupled with a corresponding field of molecular dimers. Specifically, pair-correlations in this system can dramatically modify the coherent and incoherent transfer between the atomic and molecular fields. 
M. Holland, J. Park, and R. Walser