2023/06/19 by Klimovich, Nikita, Day, Peter, Shu, Shibo +3 · 1 citation
#FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Quantum Physics (quant-ph)
paper · doi:10.48550/arxiv.2306.11028
Recent progress in quantum computing and the development of novel detector technologies for astrophysics is driving the need for high-gain, broadband, and quantum-limited amplifiers. We present a purely traveling-wave parametric amplifier (TWPA) using an inverted NbTiN microstrip and amorphous Silicon dielectric. Through dispersion engineering, we are able to obtain 50~Ω impedance matching and suppress undesired parametric processes while phase matching the three-wave-mixing amplification across a large range of frequencies. The result is a broadband amplifier operating with 20 dB gain and quantum-limited noise performance at 20 mK. At the single frequency where the amplifier is phase sensitive, we further demonstrate 8 dB of vacuum noise squeezing.