Observation of Localized Multi-Spatial-Mode Quadrature Squeezing
Observation of Localized Multi-Spatial-Mode Quadrature Squeezing
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DOI：
10.1103/physrevx.5.031004
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发表时间：
2015-07-09
影响因子：
12.5
通讯作者：
Boyer, V.
中科院分区：
文献类型：
--
作者：
Embrey, C. S.;Turnbull, M. T.;Boyer, V.
当图像质量和分辨率受到照明的量子噪声的限制时，光的量子态可以改善成像。在明亮照明的情况下，由多个压缩横模组成的光场得到了量子增强。这种多空间模式压缩态的一种可能实现是包含横向平面的场，其中局部电场在任何一个正交上的所有位置处显示减少的量子涨落。使用行波放大器，我们产生了一个多空间模式压缩态，并表明它表现出本地化的正交压缩在其横向轮廓的任何一点，在区域远小于其大小。我们观察到75个独立的压缩区域。这种放大依赖于热蒸气中的非简并四波混频，并产生双色压缩态。结果证实了这种技术产生适合于实际量子成像的照明的潜力。
Quantum states of light can improve imaging whenever the image quality and resolution are limited by the quantum noise of the illumination. In the case of a bright illumination, quantum enhancement is obtained for a light field composed of many squeezed transverse modes. A possible realization of such a multi-spatial-mode squeezed state is a field which contains a transverse plane in which the local electric field displays reduced quantum fluctuations at all locations, on any one quadrature. Using a traveling-wave amplifier, we have generated a multi-spatial-mode squeezed state and showed that it exhibits localized quadrature squeezing at any point of its transverse profile, in regions much smaller than its size. We observe 75 independently squeezed regions. The amplification relies on nondegenerate four-wave mixing in a hot vapor and produces a bichromatic squeezed state. The result confirms the potential of this technique for producing illumination suitable for practical quantum imaging.