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Cited by 178

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Strong environmental coupling in a Josephson parametric amplifier

Open access
Mutus, J. Y., White, T. C., Barends, R., Chen, Yu, Chen, Z., Chiaro, B., Dunsworth, A., Jeffrey, E., Kelly, J., Megrant, A., Neill, C., O'Malley, P. J. J., Roushan, P., Sank, D., Vainsencher, A., Wenner, J., Sundqvist, K. M., Cleland, A. N., Martinis, John M.·2014·Applied Physics Letters

Abstract

We present a lumped-element Josephson parametric amplifier designed to operate with strong coupling to the environment. In this regime, we observe broadband frequency dependent amplification with multi-peaked gain profiles. We account for this behavior using the “pumpistor” model which allows for frequency dependent variation of the external impedance. Using this understanding, we demonstrate control over the complexity of gain profiles through added variation in the environment impedance at a given frequency. With strong coupling to a suitable external impedance, we observe a significant increase in dynamic range, and large amplification bandwidth up to 700 MHz giving near quantum-limited performance.

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Metadata

Authors
Mutus, J. Y., White, T. C., Barends, R., Chen, Y., Chen, Z., Chiaro, B., Dunsworth, A., Jeffrey, E., Kelly, J., Megrant, A., Neill, C., O'Malley, P. J. J., Roushan, P., Sank, D., Vainsencher, A., Wenner, J., Sundqvist, K. M., Cleland, A. N., & Martinis, J. M.
Venue
Applied Physics Letters
Published
2014-06-30
Volume
104
Issue
26
ISSN
  • 0003-6951 (ISSN-L)
  • 1077-3118
OpenAlex
W2095496578
Cited by
178
References
2
FWCI
11.88
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Strong environmental coupling in a Josephson parametric amplifier. https://app.cochat.ai/papers/10.1063/1.4886408
The paper
Mutus, J. Y., White, T. C., Barends, R., Chen, Y., Chen, Z., Chiaro, B., Dunsworth, A., Jeffrey, E., Kelly, J., Megrant, A., Neill, C., O'Malley, P. J. J., Roushan, P., Sank, D., Vainsencher, A., Wenner, J., Sundqvist, K. M., Cleland, A. N., & Martinis, J. M. (2014). Strong environmental coupling in a Josephson parametric amplifier. Applied Physics Letters. https://doi.org/10.1063/1.4886408

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.