论文标题
三波混合行进波参数放大器，并具有周期性变化电路参数
Three-wave mixing traveling-wave parametric amplifier with periodic variation of the circuit parameters
论文作者
论文摘要
我们报告了使用三波混合（3WM）的近量子限制，行进波参数放大器的实现。为了通过3WM放大，我们使用了具有直流磁通量的超导非线性不对称电感元件（蜗牛）环。此外，我们为该设备配备了分散工程功能，以在泵的第二个谐波上创建一个停止波段，并抑制较高谐波的传播，否则否则会降低扩增。该放大器具有440个蜗牛的链条，最多可提供20 dB增益和3 dB的带宽为1 GHz。发现放大器增加的噪声小于一个光子。
We report the implementation of a near-quantum-limited, traveling-wave parametric amplifier that uses three-wave mixing (3WM). To favor amplification by 3WM, we use the superconducting nonlinear asymmetric inductive element (SNAIL) loops, biased with a dc magnetic flux. In addition, we equip the device with dispersion engineering features to create a stop-band at the second harmonic of the pump and suppress the propagation of the higher harmonics that otherwise degrade the amplification. With a chain of 440 SNAILs, the amplifier provides up to 20 dB gain and a 3-dB bandwidth of 1 GHz. The added noise by the amplifier is found to be less than one photon.
