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Ruskov, R.; Schwab, K.; Korotkov, A.N.
IEEE transactions on nanotechnology, 2005-Jan., 2005-01-00, 20050101, Letnik: 4, Številka: 1Journal Article
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.
