High Quality 3-Dimensional Aluminum Microwave Cavities

Abstract

We present a comprehensive study of internal quality factors in superconducting stub-geometry 3-dimensional cavities made of aluminum. We use wet etching, annealing and electrochemichal polishing to improve the as machined quality factor. We find that the dominant loss channel is split between two-level system loss and an unknown source with 60:40 proportion. A total of 17 cavities of different purity, resonance frequency and size were studied. Our treatment results in reproducible cavities, with ten of them showing internal quality factors above 80 million at a power corresponding to an average of a single photon in the cavity. The best cavity has an internal quality factor of 115 million at single photon level.

References in corpus (19)

• Decoherence in Josephson Qubits from Dielectric Loss
• A quantum memory with near-millisecond coherence in circuit QED
• Surface participation and dielectric loss in superconducting qubits
• Fluctuations of Energy-Relaxation Times in Superconducting Qubits
• Decoherence benchmarking of superconducting qubits
• Efficient and robust analysis of complex scattering data under noise in microwave resonators
• Demonstration of quantum error correction and universal gate set on a binomial bosonic logical qubit
• Correlating decoherence in transmon qubits: Low frequency noise by single fluctuators
• Reaching 10 ms single photon lifetimes for superconducting aluminum cavities
• Analysis and mitigation of interface losses in trenched superconducting coplanar waveguide resonators
• Superconducting quantum node for entanglement and storage of microwave radiation
• Understanding Quality Factor Degradation in Superconducting Niobium Cavities at Low Microwave Field Amplitudes
• Reducing quantum-regime dielectric loss of silicon nitride for superconducting quantum circuits
• Losses in coplanar waveguide resonators at millikelvin temperatures
• Noise and loss of superconducting aluminium resonators at single photon energies
• A 3D Printed Superconducting Aluminium Microwave Cavity
• Low-Loss Superconducting Nanowire Circuits Using a Neon Focused Ion Beam
• Characterization of low loss microstrip resonators as a building block for circuit QED in a 3D waveguide
• Analytical modeling of participation reduction in superconducting coplanar resonator and qubit designs through substrate trenching

Cited by in corpus (25)

• Quantum information processing with bosonic qubits in circuit QED
• Superconducting cavity qubit with tens of milliseconds single-photon coherence time
• Robust preparation of Wigner-negative states with optimized SNAP-displacement sequences
• Seamless high-Q microwave cavities for multimode circuit QED
• Towards highly efficient broadband superconducting quantum memory
• Non-Markovian Effects of Two-Level Systems in a Niobium Coaxial Resonator with a Single-Photon Lifetime of 10 ms
• Identification of different types of high-frequency defects in superconducting qubits
• Single-step implementation of a hybrid controlled-NOT gate with one superconducting qubit simultaneously controlling multiple target cat-state qubits
• Designing Kerr Interactions for Quantum Information Processing via Counterrotating Terms of Asymmetric Josephson-Junction Loops
• The scattering coefficients of superconducting microwave resonators: I. Transfer-matrix approach
• Shaping photons: quantum computation with bosonic cQED
• One-step implementation of a multi-target-qubit controlled-phase gate with photonic qubits encoded via eigenstates of the photon-number parity operator
• Quantum State Tomography with Conditional Generative Adversarial Networks
• An engineering guide to superconducting quantum circuit shielding
• Polymer-loaded three dimensional microwave cavities for hybrid quantum systems
• Quantum manipulation of a two-level mechanical system
• Material matters in superconducting qubits
• Quantum process tomography of continuous-variable gates using coherent states
• Ac losses in field-cooled type I superconducting cavities
• Experimental realization of deterministic and selective photon addition in a bosonic mode assisted by an ancillary qubit
• Intermodulation spectroscopy and the nonlinear response of two-level systems in superconducting coplanar waveguide resonators
• Quantum voting machine encoded with microwave photons
• Precision measurements of the zero temperature dielectric constant and density of liquid ${}^4$He
• Low-loss Material for Infrared Protection of Cryogenic Quantum Applications
• Stability of superconducting resonators: motional narrowing and the role of Landau-Zener driving of two-level defects