Hybrid cavity mechanics with doped systems
  We investigate the dynamics of a mechanical resonator in which is embedded an ensemble of two-level systems interacting with an optical cavity field. We show that this hybrid approach to optomechanics allows for enhanced effective interactions between the mechanics and the cavity field, leading for instance to ground state cooling of the mechanics, even in regimes, like the unresolved sideband regime, in which standard radiation pressure cooling would be inefficient. 
Aurelien Dantan, Bhagya Nair, Guido Pupillo, Claudiu Genes
quant-ph