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arXiv 1505.05850quant-phcond-mat.quant-gasphysics.atom-phphysics.optics
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受量子反作用限制的机械振子的腔介导耦合

Cavity-mediated coupling of mechanical oscillators limited by quantum backaction

Nicolas Spethmann, Jonathan Kohler, Sydney Schreppler, Lukas Buchmann, Dan M. Stamper-Kurn

摘要:

一个复杂的量子系统可以通过简单的量子元素相互耦合来构建。例如,俘获离子或超导量子比特可以通过库仑相互作用耦合,通过虚光子的交换来介导。或者,量子物体可以通过交换实光子来耦合,特别是当在谐振器内驱动时,谐振器放大了与单个电磁模式的相互作用。然而,在这样的开放系统中,耦合信道传送量子信息或产生纠缠的能力可能受到损害。在这里,我们实现了两个空间分离的,近基态的机械振荡器之间的相位相干相互作用的驱动光学腔。我们还观察到的光耦合,这导致在相关的两个振荡器的机械波动所赋予的噪声。实现量子反作用占主导地位的制度打开了大门,许多应用腔光学力学与复杂的机械系统。因此,我们的结果说明了量子物体与光耦合的潜力和挑战。

英文摘要:

A complex quantum system can be constructed by coupling simple quantum elements to one another. For example, trapped-ion or superconducting quantum bits may be coupled by Coulomb interactions, mediated by the exchange of virtual photons. Alternatively quantum objects can be coupled by the exchange of real photons, particularly when driven within resonators that amplify interactions with a single electro-magnetic mode. However, in such an open system, the capacity of a coupling channel to convey quantum information or generate entanglement may be compromised. Here, we realize phase-coherent interactions between two spatially separated, near-ground-state mechanical oscillators within a driven optical cavity. We observe also the noise imparted by the optical coupling, which results in correlated mechanical fluctuations of the two oscillators. Achieving the quantum backaction dominated regime opens the door to numerous applications of cavity optomechanics with a complex mechanical system. Our results thereby illustrate the potential, and also the challenge, of coupling quantum objects with light.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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