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arXiv · 1409.8160

Characterization of a multimode coplanar waveguide parametric amplifier

M. Simoen·C. W. S. Chang·P. Krantz·Jonas Bylander·W. Wustmann·V. Shumeiko·P. Delsing·C. M. Wilson
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Abstract

We characterize a novel Josephson parametric amplifier based on a flux-tunable quarter-wavelength resonator. The fundamental resonance frequency is ~1GHz, but we use higher modes of the resonator for our measurements. An on-chip tuning line allows for magnetic flux pumping of the amplifier. We investigate and compare degenerate parametric amplification, involving a single mode, and nondegenerate parametric amplification, using a pair of modes. We show that we reach quantum-limited noise performance in both cases, and we show that the added noise can be less than 0.5 added photons in the case of low gain.

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M. Simoen, C. W. S. Chang, P. Krantz, Jonas Bylander, W. Wustmann, V. Shumeiko, P. Delsing, C. M. Wilson. 2014-09-29. Characterization of a multimode coplanar waveguide parametric amplifier. https://doi.org/10.1063/1.4933265

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