Quantum information approach to Bose-Einstein condensate of composite bosons

Su-Yong Lee (Centre for Quantum Technologies, National University of Singapore)

Composite boson (coboson) is a composite system comprised of two elementary particles; i.e., an 
inseparable pair of fermions or bosons. Here we study Bose-Einstein condensation (BEC) for 
 indistinguishable cobosons. We find that the condensate fraction and the transition temperature 
 are increasing functions of the entanglement between the two constituent fermions. In contrast  for
 cobosons comprised of fermions, the condensate fraction and the transition temperature are 
 decreased by raising the entanglement between the two constituent bosons.