Entanglement and phase transitions in a exciton-polariton bec confined in a photonic crystal nanocavity

In this work we study a polariton-exciton system confined in photonic crystal nanocavity with embedded quantum dot. Using a separable state of the type BCS, for the matter subsystem, product by a coherent state, for the photonic mode, we compute the ground state energy of N polaritons. Also, we char...