Nanophotonic source of quadrature squeezing via self-phase modulation
Nanophotonic source of quadrature squeezing via self-phase modulation
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DOI：
10.1063/5.0024341
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发表时间：
2020-10-01
期刊：
影响因子：
5.6
通讯作者：
Politi, Alberto
中科院分区：
文献类型：
--
作者：
Cernansky, Robert;Politi, Alberto
压缩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，可以用来在量子密钥分发渠道中实现更精确的测量和提高安全性，并作为量子计算的基础资源。在这里，我们展示了一种基于四波混频的集成压缩源，它需要一个单一的激光泵浦，在高频下测量0.45分贝的宽带正交压缩。我们确定并验证了当前的结果受到芯片中产生的过多噪声的限制，并提出了减少它的方法。计算表明，通过现有技术可以改善芯片的光学特性，可以开发基于光的可扩展量子技术。
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.