Parametric amplification and back-action noise squeezing by a qubit-coupled nanoresonator.
basic_science · Level V
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- Record sourced from PubMed, PMID 20843059.
- Also identified by DOI 10.1021/nl101844r.
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Abstract
We demonstrate the parametric amplification and noise squeezing of nanomechanical motion utilizing dispersive coupling to a Cooper-pair box qubit. By modulating the qubit bias and resulting mechanical resonance shift, we achieve gain of 30 dB and noise squeezing of 4 dB. This qubit-mediated effect is 3000 times more effective than that resulting from the weak nonlinearity of capacitance to a nearby electrode. This technique may be used to prepare nanomechanical squeezed states.