三波混频真空压缩生成在基于SNAIL的行波参数放大器中的实现
Three wave mixing vacuum squeezing generation in a SNAIL-based Traveling-Wave Parametric Amplifier with alternated flux polarity
AI总结：
本文研究了基于SNAIL的行波参数放大器中通过残余三波混频生成真空压缩的现象，探讨了四波混频与三波混频非线性竞争的影响，为微波光子学应用提供了新见解。
摘要：
近期利用行波参数放大器（TWPAs）生成压缩的研究为广谱微波压缩在量子传感、量子增强探测和连续变量量子信息中的应用开辟了道路。本文演示了在基于超导非线性非对称电感元件（SNAILs）的约瑟夫线行波参数放大器中，通过残余三波混频（3WM）实现真空压缩生成。通过研究四波混频（4WM）和三波混频非线性之间的竞争，我们证明了在选择合适的操作磁通量点时，可通过残余三波混频生成真空压缩。本研究为TWPA压缩器中竞争非线性影响提供了有价值的见解，可能扩展微波光子学框架中的应用范围。
英文摘要：
Recent demonstrations of squeezing generation using Traveling Wave Parametric Amplifiers (TWPAs) have opened the way for the application of broadband microwave squeezing in quantum sensing, quantum-enhanced detection, and continuous-variable quantum information. Here we demonstrate vacuum squeezing generation via residual three-wave mixing (3WM) in a Josephson TWPA based on superconducting nonlinear asymmetric inductive elements (SNAILs) with alternated magnetic flux polarity. By investigating competition between four-wave mixing (4WM) and 3WM nonlinearities, we prove that vacuum squeezing generation via residual 3WM is possible when a careful choice of the operating flux point is adopted. Our study provides valuable insights on the impact of competing nonlinearities on TWPA squeezers, potentially extending the range of applications in the framework of microwave photonics.
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