Loss Dependence on Geometry and Applied Power in Superconducting Coplanar Resonators

Abstract

The loss in superconducting microwave resonators at low-photon number and low temperatures is not well understood but has implications for achievable coherence times in superconducting qubits. We have fabricated single-layer resonators with a high quality factor by patterning a superconducting aluminum film on a sapphire substrate. Four resonator geometries were studied with resonant frequencies ranging from 5 to 7 GHz: a quasi-lumped element resonator, a coplanar strip waveguide resonator, and two hybrid designs that contain both a coplanar strip and a quasi-lumped element. Transmitted power measurements were taken at 30 mK as a function of frequency and probe power. We find that the resonator loss, expressed as the inverse of the internal quality factor, decreases slowly over four decades of photon number in a manner not merely explained by loss from a conventional uniform spatial distribution of two-level systems in an oxide layer on the superconducting surfaces of the resonator.

4 pages, 5 figures, Submitted to ASC 2010 conference proceedings

References in corpus (11)

• Coherent quantum state storage and transfer between two phase qubits via a resonant cavity
• Controlling the spontaneous emission of a superconducting transmon qubit
• Experimental evidence for a surface distribution of two-level systems in superconducting lithographed microwave resonators
• Microwave Dielectric Loss at Single Photon Energies and milliKelvin Temperatures
• Improving the Coherence Time of Superconducting Coplanar Resonators
• A semi-empirical model for two-level system noise in superconducting microresonators
• Minimal resonator loss for circuit quantum electrodynamics
• Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators
• Reducing quantum-regime dielectric loss of silicon nitride for superconducting quantum circuits
• On the properties of superconducting planar resonators at mK temperatures
• Decoherence of floating qubits due to capacitive coupling

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