With the aim to loosen the entanglement requirements of quantum illumination, we study the performance of a family of Gaussian states at the transmitter, combined with an optimal and joint quantum measurement at the receiver. We find that maximal entanglement is not strictly necessary to achieve quantum advantage over the classical benchmark of a coherent-state transmitter, in both settings of symmetric and asymmetric hypothesis testing. While performing this quantum-classical comparison, we also investigate a suitable regime of parameters for potential short-range radar (or scanner) applications.

中文翻译：

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具有通用高斯光源的量子照明

为了放宽对量子照明的纠缠要求，我们研究了发射器处一族高斯态的性能，并结合了接收器处的最优联合量子测量。我们发现在对称和非对称假设测试的设置中，最大纠缠对于实现优于相干态发射器经典基准的量子优势并非绝对必要。在进行量子经典比较时，我们还研究了适用于潜在短程雷达（或扫描仪）应用的合适参数范围。