Strongly quadrature-dependent noise in superconducting micro-resonators measured at the vacuum-noise limit

Abstract

We measure frequency- and dissipation-quadrature noise in superconducting lithographed microwave resonators with sensitivity near the vacuum noise level using a Josephson parametric amplifier. At an excitation power of 100~nW, these resonators show significant frequency noise caused by two-level systems. No excess dissipation-quadrature noise (above the vacuum noise) is observed to our measurement sensitivity. These measurements demonstrate that the excess dissipation-quadrature noise is negligible compared to vacuum fluctuations, at typical readout powers used in micro-resonator applications. Our results have important implications for resonant readout of various devices such as detectors, qubits and nano-mechanical oscillators.

13 pages, 4 figures

References in corpus (5)

• Amplification and squeezing of quantum noise with a tunable Josephson metamaterial
• Experimental evidence for a surface distribution of two-level systems in superconducting lithographed microwave resonators
• A semi-empirical model for two-level system noise in superconducting microresonators
• Temperature Dependence of the Frequency and Noise of Superconducting Coplanar Waveguide Resonators
• Strongly quadrature-dependent noise in superconducting micro-resonators measured at the vacuum-noise limit

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