Optimal operation of a Josephson parametric amplifier for vacuum squeezing

M. Malnou; D. A. Palken; Leila R. Vale; Gene C. Hilton; K. W. Lehnert

doi:10.1103/PhysRevApplied.9.044023

Optimal operation of a Josephson parametric amplifier for vacuum squeezing

Quantum Physics 2018-04-25 v1

Authors: M. Malnou , D. A. Palken , Leila R. Vale , Gene C. Hilton , K. W. Lehnert

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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.

Keywords

parametric amplifier optical pumping

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@article{arxiv.1711.02786,
  title  = {Optimal operation of a Josephson parametric amplifier for vacuum squeezing},
  author = {M. Malnou and D. A. Palken and Leila R. Vale and Gene C. Hilton and K. W. Lehnert},
  journal= {arXiv preprint arXiv:1711.02786},
  year   = {2018}
}

Optimal operation of a Josephson parametric amplifier for vacuum squeezing

Abstract

Keywords

Cite

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