New vacuum state and symmetry breaking in polariton system
arXiv:cond-mat/9710009 · doi:10.1016/S0375-9601(97)00733-0
Abstract
The polariton system is studied by a concise approach using a simple model. A new ground state with negative energy is obtained and found to exhibit the symmetry breaking.
Revtex, accepted by Phys. Lett. A. E-mail: [email protected] after Oct. 10, 1997