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arXiv 1602.05955quant-phcond-mat.mes-hallphysics.optics
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多光子计数产生机械干涉条纹

Generation of mechanical interference fringes by multi-photon counting

M. Ringbauer, T. J. Weinhold, L. A. Howard, A. G. White, M. R. Vanner

摘要:

探索宏观物体的量子行为为研究物理学基础和开发一套量子增强技术提供了一条有趣的途径。一个突出的研究途径是量子光学力学,它利用量子光学的工具来控制宏观机械谐振器的运动。尽管最近取得了很好的进展,但由于弱耦合和热退相干,机械量子叠加态的制备仍然很突出。在这里,我们提出了一种新的光机计划,大大放宽了这些要求,允许利用多光子量子测量的非线性制备量子叠加态的机械谐振器的运动。我们的方法是能够产生非经典的机械状态,而不需要强的单光子耦合,是弹性的光损耗,并提供更有利的缩放对初始机械热占领比现有的计划。此外,我们的方法允许通过将光场投影到NOON态上来产生更大的叠加态。我们实验证明了这种多光子计数技术的机械热状态在经典极限和观察干涉条纹的机械位置分布,显示相位超分辨率。这为在宏观尺度上探索和利用量子现象开辟了一条可行的途径。

英文摘要:

Exploring the quantum behaviour of macroscopic objects provides an intriguing avenue to study the foundations of physics and to develop a suite of quantum-enhanced technologies. One prominent path of study is provided by quantum optomechanics which utilizes the tools of quantum optics to control the motion of macroscopic mechanical resonators. Despite excellent recent progress, the preparation of mechanical quantum superposition states remains outstanding due to weak coupling and thermal decoherence. Here we present a novel optomechanical scheme that significantly relaxes these requirements allowing the preparation of quantum superposition states of motion of a mechanical resonator by exploiting the nonlinearity of multi-photon quantum measurements. Our method is capable of generating non-classical mechanical states without the need for strong single photon coupling, is resilient against optical loss, and offers more favourable scaling against initial mechanical thermal occupation than existing schemes. Moreover, our approach allows the generation of larger superposition states by projecting the optical field onto NOON states. We experimentally demonstrate this multi-photon-counting technique on a mechanical thermal state in the classical limit and observe interference fringes in the mechanical position distribution that show phase superresolution. This opens a feasible route to explore and exploit quantum phenomena at a macroscopic scale.

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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