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Observation of 4.2-K equilibrium-noise squeezing via a Josephson-parametric amplifier
Abstract
We have demonstrated 42% squeezing of 4.2-K thermal noise using a Josephson-parametric amplifier operated at 19.4 GHz. The amplifier has been operated at 0.1 K with an excess noise of 0.28 K referred to the input port. This is less than the vacuum fluctuation noise h\ensuremath{\nu}/2k=0.47 K at 19.4 GHz. The amplifier thus is less noise than a linear phase-insensitive amplifier such as a maser could in principle be.
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Cited by
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Kjaergaard, M., Schwartz, M. E., Braumüller, J., Krantz, P., Wang, J. I.-J., Gustavsson, S., & Oliver, W. D. (2020) · Annual Review of Condensed Matter Physics · doi:10.1146/annurev-conmatphys-031119-050605 · Cited by 1,544
Microwave photonics with superconducting quantum circuits
Gu, X., Kockum, A. F., Miranowicz, A., Liu, Y.-X., & Nori, F. (2017) · Physics Reports · doi:10.1016/j.physrep.2017.10.002 · Cited by 1,307
Metadata
- Authors
- Yurke, B., Kaminsky, P. G., Miller, R. E., Whittaker, E. A., Smith, A. D., Silver, A. H., & Simon, R. W.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1988-02-29
- Volume
- 60
- Issue
- 9
- Pages
- 764-767
- ISSN
- 0031-9007 (ISSN-L)
- OpenAlex
- W1998849351
- Cited by
- 246
- References
- 0
- FWCI
- 9.53
- Type
- journal article
- Language
- en
- Open access
- closed
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How to cite
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- CoChat. (2026). Citation check: Observation of 4.2-K equilibrium-noise squeezing via a Josephson-parametric amplifier. https://app.cochat.ai/papers/10.1103/physrevlett.60.764
- The paper
- Yurke, B., Kaminsky, P. G., Miller, R. E., Whittaker, E. A., Smith, A. D., Silver, A. H., & Simon, R. W. (1988). Observation of 4.2-K equilibrium-noise squeezing via a Josephson-parametric amplifier. Physical Review Letters. https://doi.org/10.1103/physrevlett.60.764
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