Steady-state negative Wigner functions of nonlinear nanomechanical oscillators
Steady-state negative Wigner functions of nonlinear nanomechanical oscillators
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DOI：
10.1088/1367-2630/14/2/023042
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发表时间：
2011-04
影响因子：
3.3
通讯作者：
S. Rips;M. Kiffner;I. Wilson-Rae;Michael J. Hartmann
中科院分区：
文献类型：
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作者：
S. Rips;M. Kiffner;I. Wilson-Rae;Michael J. Hartmann
我们提出了一个计划，准备纳米机械振荡器在非经典稳态，其特征在于一个明显的负维格纳函数。在我们的光学机械方法中，机械振荡器耦合到光学腔的多个激光驱动谐振。通过非均匀静电场降低振荡器的谐振频率，我们显著地增强了其固有的几何非线性。这使得运动边带分裂成单独的谱线为每个声子数和个别声子之间的跃迁福克状态可以选择性地解决。我们表明，这使得在一个单一的声子福克态的纳米机械振荡器的准备。例如，我们的方案可以用碳纳米管分散地耦合到最先进的回音壁模式微腔的倏逝场来实现。
We propose a scheme for preparing nanomechanical oscillators in nonclassical steady states, characterized by a pronounced negative Wigner function. In our optomechanical approach, the mechanical oscillator couples to multiple laser-driven resonances of an optical cavity. By lowering the resonance frequency of the oscillator via an inhomogeneous electrostatic field, we significantly enhance its intrinsic geometric nonlinearity per phonon. This causes the motional sidebands to split into separate spectral lines for each phonon number and transitions between individual phonon Fock states can be selectively addressed. We show that this enables the preparation of the nanomechanical oscillator in a single-phonon Fock state. Our scheme can, for example, be implemented with a carbon nanotube dispersively coupled to the evanescent field of a state of the art whispering gallery mode microcavity.