Squeezed light is optical beams with variance below the shot noise level. They are a key resource for quantum technologies based on photons, and they can be used to achieve better precision measurements and improve security in quantum key distribution channels and as a fundamental resource for quantum computation. Here, we demonstrate an integrated source of squeezing based on four-wave mixing that requires a single laser pump, measuring 0.45 dB of broadband quadrature squeezing at high frequencies. We identify and verify that the current results are limited by excess noise produced in the chip and propose ways to reduce it. Calculations suggest that an improvement in the optical properties of the chip achievable with existing technology can develop scalable quantum technologies based on light.

中文翻译：

---

通过自相位调制实现正交压缩的纳米光子源

压缩的光是方差低于散粒噪声水平的光束。它们是基于光子的量子技术的关键资源，可用于实现更好的精度测量并提高量子密钥分配通道中的安全性，并且可作为量子计算的基本资源。在这里，我们演示了基于四波混频的集成压缩源，它需要一个激光泵，在高频下测量0.45 dB的宽带正交压缩。我们确定并验证当前结果是否受到芯片中产生的过多噪声的限制，并提出了降低噪声的方法。计算表明，利用现有技术可实现的芯片光学特性的改进可以开发基于光的可扩展量子技术。