We show that the nanoresonator position can be squeezed significantly below the ground state level by measuring the nanoresonator with a quantum point contact or a single-electron transistor and applying a periodic voltage across the detector. The mechanism of squeezing is basically a generalization of quantum nondemolition measurement of an oscillator to the case of continuous measurement by a weakly coupled detector. The quantum feedback is necessary to prevent the ``heating'' due to measurement back-action. We also discuss a procedure of experimental verification of the squeezed state.
Cite
@article{arxiv.cond-mat/0406416,
title = {Quantum Nondemolition Squeezing of a Nanomechanical Resonator},
author = {Rusko Ruskov and Keith Schwab and Alexander N. Korotkov},
journal= {arXiv preprint arXiv:cond-mat/0406416},
year = {2009}
}