Journal
IEEE TRANSACTIONS ON NANOTECHNOLOGY
Volume 4, Issue 1, Pages 132-140Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNANO.2004.840171
Keywords
nano-electromechanical systems (NEMS); quantum feedback; squeezing
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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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