The quantum nature of the state of a bosonic quantum field may manifest itself in its entanglement, coherence, or optical nonclassicality. Each of these distinct properties is known to be a resource for quantum computing or metrology and can be evaluated via a variety of measures, witnesses, or monotones. Here, we provide quantitative and computable bounds relating, in particular, some entanglement measures with optical nonclassicality measures. Overall, these bounds capture the fact that strongly entangled states must necessarily be strongly optically nonclassical. As an application, we infer strong bounds on the entanglement that can be produced with an optically nonclassical state impinging on a beam splitter. Then, focusing on Gaussian states, we analyze the link between the logarithmic negativity and a specific nonclassicality measure called quadrature coherence scale.

中文翻译：

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玻色子量子场多模态的纠缠和光学非经典性

玻色子量子场状态的量子性质可能以其纠缠，相干或光学非经典性表现出来。众所周知，这些不同的属性中的每一个都是用于量子计算或度量衡的资源，可以通过各种度量，见证或单调进行评估。在这里，我们提供了定量和可计算的界线，特别是与光学非经典度度量的一些纠缠度量有关。总的来说，这些界限反映了这样一个事实，即强纠缠态必须在光学上必定是非经典的。作为一种应用，我们推断出在光学非经典状态撞击分束器时可能产生的纠缠的强边界。然后，关注高斯状态，