Stationary entanglement between two movable mirrors in a classically   driven Fabry-Perot cavity
  We consider a Fabry-Perot cavity made by two moving mirrors and driven by an intense classical laser field. We show that stationary entanglement between two vibrational modes of the mirrors, with effective mass of the order of micrograms, can be generated by means of radiation pressure. The resulting entanglement is however quite fragile with respect to temperature. 
David Vitali, Stefano Mancini, and Paolo Tombesi