2017/11/08 by M. Malnou, D. A. Palken, D. A. Palken +4 · 3 citations
Computer Science · Physics and Astronomy · #Advanced Frequency and Time Standards #Amplifier #Atomic and Subatomic Physics Research #Limit (mathematics) #Microwave #Parametric oscillator #Parametric statistics #Quantum Information and Cryptography #Quantum limit #quant-ph
paper · pdf · doi:10.1103/physrevapplied.9.044023
published as Phys. Rev. Applied 9, 044023 (2018)
arxiv created 2017/11/08 · openalex created_date 2017/11/17 · openalex publication_date 2018/04/17 · arxiv updated 2018/04/25 · openalex updated_date 2026/08/06
``Squeezed'' states of the microwave field, which allow one to beat the Heisenberg uncertainty limit for some phase values, find diverse applications in improving quantum measurements. These states can be created using a Josephson parametric amplifier (JPA) operated with a single current pump, but nonlinearities limit the available squeezing. The authors show how to choose pump-tone parameters to reduce this distortion, so that anyone with such a JPA can squeeze harder for better measurements, without needing extra hardware or a more complicated scheme.