Quantum nondemolition measurement of discrete Fock states of a nanomechanical resonator E. Buks, E. Segev, S. Zaitsev, B. Abdo and M. P. Blencowe EPL, 81 1 (2008) 10001 Published online: 19 November 2007 DOI: 10.1209/0295-5075/81/10001