Phase super-sensitivity is obtained when the sensitivity in a phase measurement goes beyond the quantum shot noise limit, whereas super-resolution is obtained when the interference fringes in an interferometer are narrower than half the input wavelength. Here we show experimentally that these two features can be simultaneously achieved using a relatively simple setup based on Gaussian states and homodyne measurement. Using 430 photons shared between a coherent and a squeezed vacuum state, we demonstrate a 22-fold improvement in the phase resolution, while we observe a 1.7-fold improvement in the sensitivity. In contrast to previous demonstrations of super-resolution and super-sensitivity, this approach is fully deterministic.

中文翻译：

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确定性相位测量具有超灵敏性和超分辨率

当相位测量中的灵敏度超过量子散粒噪声极限时，获得相位超灵敏度；而当干涉仪中的干涉条纹窄于输入波长的一半时，则获得超分辨率。在这里，我们通过实验证明，使用基于高斯状态和零差测量的相对简单的设置可以同时实现这两个功能。使用相干和压缩真空状态之间共享的430个光子，我们证明了相位分辨率提高了22倍，而观察到的灵敏度提高了1.7倍。与以前的超分辨率和超灵敏度演示相反，这种方法是完全确定性的。