Parametric Amplification and Back-Action Noise Squeezing by a Qubit-Coupled Nanoresonator
详细信息 查看全文
- 作者：Junho Suh ; Matthew D. LaHaye ; Pierre M. Echternach ; Keith C. Schwab ; Michael L. Roukes
- 刊名：Nano Letters
- 出版年：2010
- 出版时间：October 13, 2010
- 年：2010
- 卷：10
- 期：10
- 页码：3990-3994
- 全文大小：330K
- 年卷期：v.10,no.10(October 13, 2010)
- ISSN：1530-6992
文摘
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.