Time evolution of the energy density inside a non-static cavity with a   thermal, coherent and a Schrodinger cat state
  In this paper we investigate the time evolution of the energy density for a real massless scalar field in a two-dimensional spacetime, inside a non-static cavity, taking as basis the exact numerical approach purposed by Cole and Schieve. Considering Neunmann and Dirichlet boundary conditions, we investigate the following initial states of the field: vacuum, thermal state, the coherent state and the Schrodinger cat state. 
Danilo T. Alves, Edney R. Granhen, Mateus G. Lima, Hector O. Silva and   Andreson L. C. Rego