Low-Loss Superconducting Nanowire Circuits Using a Neon Focused Ion Beam

Abstract

We present low-temperature measurements of low-loss superconducting nanowire-embedded resonators in the low-power limit relevant for quantum circuits. The superconducting resonators are embedded with superconducting nanowires with widths down to 20nm using a neon focused ion beam. In the low-power limit, we demonstrate an internal quality factor up to 3.9x10^5 at 300mK [implying a two-level-system-limited quality factor up to 2x10^5 at 10 mK], not only significantly higher than in similar devices but also matching the state of the art of conventional Josephson-junction-embedded resonators. We also show a high sensitivity of the nanowire to stray infrared photons, which is controllable by suitable precautions to minimize stray photons in the sample environment. Our results suggest that there are excellent prospects for superconducting-nanowire-based quantum circuits.

arXiv commentPublished open access in PR Applied https://doi.org/10.1103/PhysRevApplied.8.014039

References in corpus (30)

• Scalable Quantum Simulation of Molecular Energies
• Efficient and robust analysis of complex scattering data under noise in microwave resonators
• Coherent quantum phase slip
• Loss and decoherence due to stray infrared light in superconducting quantum circuits
• Reducing intrinsic loss in superconducting resonators by surface treatment and deep etching of silicon substrates
• Protecting superconducting qubits from external sources of loss and heat
• Number fluctuations of sparse quasiparticles in a superconductor
• Observation of directly interacting coherent two-level systems in a solid
• Evidence for interacting two-level systems from the 1/f noise of a superconducting resonator
• Suppressing relaxation in superconducting qubits by quasiparticle pumping
• Evidence of a nonequilibrium distribution of quasiparticles in the microwave response of a superconducting aluminium resonator
• Characterization and reduction of microfabrication-induced decoherence in superconducting quantum circuits
• Generalized Tunneling Model for TLS in amorphous materials and its predictions for their dephasing and the noise in superconducting microresonators
• Losses in coplanar waveguide resonators at millikelvin temperatures
• Quantum phase slip interference device based on superconducting nanowire
• Loss Dependence on Geometry and Applied Power in Superconducting Coplanar Resonators
• On the properties of superconducting planar resonators at mK temperatures
• Analysis of high quality superconducting resonators: consequences for TLS properties in amorphous oxides
• Internal loss of superconducting resonators induced by interacting two level systems
• Loss mechanisms in superconducting thin film microwave resonators
• NbSi nanowire quantum-phase-slip circuits: dc supercurrent blockade, microwave measurements and thermal analysis
• Non-equilibrium superconductivity in superconducting resonators
• Characterization of a multimode coplanar waveguide parametric amplifier
• Is charge noise in single electron transistors and charge qubits caused by metallic grains?
• Nanometric constrictions in superconducting coplanar waveguide resonators
• Impedance-matched low-pass stripline filters
• Nonlinear microwave response of aluminum weak-link Josephson oscillators
• Dynamic parity recovery in a strongly driven Cooper-pair box
• Coherent dynamics and decoherence in a superconducting weak link
• Evidence for universal relationship between the measured 1/f permittivity noise and loss tangent created by tunneling atoms

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• Intermodulation spectroscopy and the nonlinear response of two-level systems in superconducting coplanar waveguide resonators
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