Quantum optomechanics of a multimode system coupled via photothermal and   radiation pressure force
  We provide a full quantum description of the optomechanical system formed by a Fabry-Perot cavity with a movable micro-mechanical mirror whose center-of-mass and internal elastic modes are coupled to the driven cavity mode by both radiation pressure and photothermal force. Adopting a quantum Langevin description, we investigate simultaneous cooling of the micromirror elastic and center-of-mass modes, and also the entanglement properties of the optomechanical multipartite system in its steady state. 
Mehdi Abdi, Ali Reza Bahrampour and David Vitali
quant-ph cond-mat.mes-hall