Reduced frequency noise in superconducting resonators

Abstract

We report a reduction of the frequency noise in coplanar waveguide superconducting resonators. The reduction of 7 dB is achieved by removing the exposed dielectric substrate surface from the region with high electric fields and by using NbTiN. In a model-analysis the surface of NbTiN is found to be a negligible source of noise, experimentally supported by a comparison with NbTiN on SiOx resonators. The reduction is additive to decreasing the noise by widening the resonators.

4 pages, 4 figures

References in corpus (7)

• Experimental evidence for a surface distribution of two-level systems in superconducting lithographed microwave resonators
• Noise Properties of Superconducting Coplanar Waveguide Microwave Resonators
• A semi-empirical model for two-level system noise in superconducting microresonators
• Minimal resonator loss for circuit quantum electrodynamics
• NIKA: A millimeter-wave kinetic inductance camera
• Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators
• Two-level system noise reduction for Microwave Kinetic Inductance Detectors

Cited by in corpus (28)

• Towards understanding two-level-systems in amorphous solids -- Insights from quantum circuits
• Reducing intrinsic loss in superconducting resonators by surface treatment and deep etching of silicon substrates
• Quasiparticle dynamics in granular aluminum close to the superconductor to insulator transition
• A dual-band millimeter-wave kinetic inductance camera for the IRAM 30-meter telescope
• Fluctuations in the electron system of a superconductor exposed to a photon flux
• Operation of a titanium nitride superconducting microresonator detector in the nonlinear regime
• Etch Induced Microwave Losses in Titanium Nitride Superconducting Resonators
• Coupling a single electron spin to a microwave resonator: Controlling transverse and longitudinal couplings
• Stückelberg interference in a superconducting qubit under periodic latching modulation
• Perspective: Challenges and Transformative Opportunities in Superconductor Vortex Physics
• Fluctuations From Edge Defects in Superconducting Resonators
• Superconducting NbTiN Thin Films with Highly Uniform Properties over a 100 mm diameter Wafer
• Suspending superconducting qubits by silicon micromachining
• Imaging electric fields in the vicinity of cryogenic surfaces using Rydberg atoms
• Quantum electromechanics of a hypersonic crystal
• Identifying capacitive and inductive loss in lumped element superconducting hybrid titanium nitride/aluminum resonators
• X-ray photon detection using superconducting resonators in thermal quasi-equilibrium
• Low loss hybrid Nb/Au superconducting resonators for quantum circuit applications
• 1/f noise of Josephson-junction-embedded microwave resonators at single photon energies and millikelvin temperatures
• Photon-induced thermal effects in superconducting coplanar waveguide resonators
• Superconducting nitridized-aluminum thin films
• Characterization of low-loss hydrogenated amorphous silicon films for superconducting resonators
• Characterization of two-level system noise for microwave kinetic inductance detector comprising niobium film on silicon substrate
• Correlated frequency noise in a multimode acoustic resonator
• Temperature dependence of microwave losses in lumped-element resonators made from superconducting nanowires with high kinetic inductance
• Geometry dependence of TLS noise and loss in a-SiC:H parallel plate capacitors for superconducting microwave resonators
• Superconducting properties of thin film $\mathrm{N}{\mathrm{b}}_{1-\mathrm{x}}\mathrm{T}{\mathrm{i}}_{\mathrm{x}}\mathrm{N}$ studied via the NMR of implanted ${}^8$Li
• Scanning tunneling spectroscopy of superconducting nitridized aluminum thin films