论文标题
具有非中心非对称非线性的超导微波谐振器
Superconducting microwave resonators with non-centrosymmetric nonlinearity
论文作者
论文摘要
我们在理论上和实验开放式的共面波导谐振器上都研究了嵌入在不同位置的中央导体中的RF鱿鱼。这些RF鱿鱼可以通过外部磁场调节，因此可以表现出具有$χ^{（2）} $类型的非中心对称非线性，并具有抑制的Kerr非线性。我们证明，这种非线性允许在腔中有效混合$λ/2 $和$λ$模式，因此可以通过三个波混合来实现各种参数效应。这些效果是第二次谐波产生，半音，在退化和非脱位方案中的参数放大以及退化状态下的脱水。
We investigated both theoretically and experimentally open-ended coplanar waveguide resonators with rf SQUIDs embedded in the central conductor at different positions. These rf SQUIDs can be tuned by an external magnetic field and thus may exhibit the non-centrosymmetric nonlinearity of $χ^{(2)}$ type with suppressed Kerr nonlinearity. We demonstrated that this nonlinearity allows for efficient mixing of $λ/2$ and $λ$ modes in the cavity and thus enables various parametric effects with three wave mixing. These effects are the second harmonic generation, the half tone generation, the parametric amplification in both degenerate and non-degenerate regimes and deamplification in degenerate regime.
