pith. sign in

arxiv: 1711.02786 · v1 · pith:BZD7FY3Xnew · submitted 2017-11-08 · 🪐 quant-ph

Optimal operation of a Josephson parametric amplifier for vacuum squeezing

M. Malnou , D. A. Palken , Leila R. Vale , Gene C. Hilton , K. W. Lehnert This is my paper
classification 🪐 quant-ph
keywords amplifiersqueezingvacuumamplitudejosephsonoperationparametricpump
0
0 comments X
read the original abstract

A Josephson parametric amplifier (JPA) can create squeezed states of microwave light, lowering the noise associated with certain quantum measurements. We experimentally study how the JPA's pump influences the phase-sensitive amplification and deamplification of a coherent tone's amplitude when that amplitude is commensurate with vacuum fluctuations. We predict and demonstrate that by operating the JPA with a pump power greater than the value that maximizes gain, the amplifier distortion is reduced and consequently squeezing is improved. Optimizing the JPA's operation in this fashion, we directly observe $3.87 \pm 0.03$ dB of vacuum squeezing.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Practical Limits to Single-Mode Vacuum Squeezing in a SNAIL Parametric Amplifier

    quant-ph 2026-03 accept novelty 5.0

    In practical SNAIL parametric amplifiers, achievable vacuum squeezing is limited by internal resonator loss and microwave chain insertion loss rather than Kerr nonlinearity.

  2. Practical Limits to Single-Mode Vacuum Squeezing in a SNAIL Parametric Amplifier

    quant-ph 2026-03 conditional novelty 4.0

    Experimental tests show achievable vacuum squeezing in practical SNAIL parametric amplifiers depends little on Kerr strength and is instead set by internal resonator loss plus microwave chain insertion loss.