Opto-mechanical micro-macro entanglement
  We propose to create and detect opto-mechanical entanglement by storing one component of an entangled state of light in a mechanical resonator and then retrieving it. Using micro-macro entanglement of light as recently demonstrated experimentally, one can then create opto-mechanical entangled states where the components of the superposition are macroscopically different. We apply this general approach to two-mode squeezed states where one mode has undergone a large displacement. Based on an analysis of the relevant experimental imperfections, the scheme appears feasible with current technology. 
R. Ghobadi, S. Kumar, B. Pepper, D. Bouwmeester, A.I. Lvovsky, C.   Simon
quant-ph