Tunable Nb superconducting resonators based upon a Ne-FIB-fabricated constriction nanoSQUID

Abstract

Hybrid superconducting--spin systems offer the potential to combine highly coherent atomic quantum systems with the scalability of superconducting circuits. To fully exploit this potential requires a high quality-factor microwave resonator, tunable in frequency and able to operate at magnetic fields optimal for the spin system. Such magnetic fields typically rule out conventional Al-based Josephson junction devices that have previously been used for tunable high-$Q$ microwave resonators. The larger critical field of niobium (Nb) allows microwave resonators with large field resilience to be fabricated. Here, we demonstrate how constriction-type weak links, patterned in parallel into the central conductor of a Nb coplanar resonator using a neon focused ion beam (FIB), can be used to implement a frequency-tunable resonator. We study transmission through two such devices and show how they realise high quality factor, tunable, field resilient devices which hold promise for future applications coupling to spin systems.

References in corpus (30)

• Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
• High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids
• Strong Coupling of a Spin Ensemble to a Superconducting Resonator
• Decoherence in a superconducting quantum bit circuit
• The Flux Qubit Revisited to Enhance Coherence and Reproducibility
• Planar Superconducting Resonators with Internal Quality Factors above One Million
• A Semiconductor Nanowire-Based Superconducting Qubit
• Strong Coupling of a Single Electron in Silicon to a Microwave Photon
• Efficient and robust analysis of complex scattering data under noise in microwave resonators
• High Kinetic Inductance Superconducting Nanowire Resonators for Circuit QED in a Magnetic Field
• Nano Superconducting Quantum Interference device: a powerful tool for nanoscale investigations
• Anisotropic rare-earth spin ensemble strongly coupled to a superconducting resonator
• Controlling spin relaxation with a cavity
• Tunable resonators for quantum circuits
• Evidence for interacting two-level systems from the 1/f noise of a superconducting resonator
• Characterization and Reduction of Capacitive Loss Induced by Sub-Micron Josephson Junction Fabrication in Superconducting Qubits
• Trapping a single vortex and reducing quasiparticles in a superconducting resonator
• Frequency-tunable Superconducting Resonators via Nonlinear Kinetic Inductance
• Direct identification of dilute surface spins on Al${}_2$O${}_3$: Origin of flux noise in quantum circuits
• Circuit analog of quadratic optomechanics
• Improving the performance of superconducting microwave resonators in magnetic fields
• Interfacing microwave qubits and optical photons via spin ensembles
• Towards a spin-ensemble quantum memory for superconducting qubits
• Nanometric constrictions in superconducting coplanar waveguide resonators
• Nonlinear microwave response of aluminum weak-link Josephson oscillators
• Low-Loss Superconducting Nanowire Circuits Using a Neon Focused Ion Beam
• On-chip SQUID measurements in the presence of high magnetic fields
• Tunable electromagnetic environment for superconducting quantum bits
• Multi-frequency Spin Manipulation Using Rapidly Tunable Superconducting Coplanar Waveguide Microresonators
• Improving superconducting resonators in magnetic fields by reduced field-focussing and engineered flux screening

Cited by in corpus (12)

• Coupling microwave photons to a mechanical resonator using quantum interference
• Fast tunable high Q-factor superconducting microwave resonators
• Tuning high-Q superconducting resonators by magnetic field reorientation
• Cooling photon-pressure circuits into the quantum regime
• Microwave quantum diode
• Josephson vortex-based memory
• Frequency Fluctuations in Tunable and Nonlinear Microwave Cavities
• Current detection using a Josephson parametric upconverter
• Millikelvin Nb nanoSQUID-embedded tuneable resonator fabricated with a neon focused-ion-beam
• Controllable tunnelling of single flux-quanta mediated by quantum phase-slip in disordered superconducting loops
• Nonlinear quantum processes in superconducting resonators terminated by neon-focused-ion-beam-fabricated superconducting nanowires
• Tunable superconducting two-chip lumped element resonator