Quantum Nondemolition Squeezing of a Nanomechanical Resonator

Details Quantum Nondemolition Squeezing of a Nanomechanical Resonator Quantum Nondemolition Squeezing of a Nanomechanical Resonator

2004-06-18

arxiv.org/abs/cond-mat/0406416v1

IEEE Trans. Nanotech. 4, 132 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 3 figures

Scientific paper

10.1109/TNANO.2004.840171

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.

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