Nonlinear microwave response of aluminum weak-link Josephson oscillators

Abstract

We present the driven response at T=30mK of 6 GHz superconducting resonators constructed from capacitively-shunted three dimensional (3D) aluminum nanobridge superconducting quantum interference devices (nanoSQUIDs). We observe flux modulation of the resonant frequency in quantitative agreement with numerical calculation and characteristic of near-ideal short weak link junctions. Under strong microwave excitation, we observe stable bifurcation in devices with coupled quality factor (Q) ranging from ~30-3500. Near this bias point, parametric amplification with > 20dB gain, 40 MHz bandwidth, and near quantum-limited noise performance is observed. Our results indicate that 3D nanobridge junctions are attractive circuit elements to realize quantum bits.

3 pages, 4 figures

References in corpus (9)

• Decoherence in Josephson Qubits from Dielectric Loss
• Quantum computing with defects
• Decoherence in Josephson Qubits from Junction Resonances
• Observation of quantum jumps in a superconducting artificial atom
• Localization of Metal-Induced Gap States at the Metal-Insulator Interface:Origin of Flux Noise in SQUIDs and Superconducting Qubits
• Approaching ideal weak link behavior with three dimensional aluminum nanobridges
• Optimizing Anharmonicity in Nanoscale Weak Link Josephson Junction Oscillators
• Superconducting Nanowires as Nonlinear Inductive Elements for Qubits
• Quantum dynamics in a camel-back potential of a dc SQUID

Cited by in corpus (22)

• Measurement-induced qubit state mixing in circuit QED from up-converted dephasing noise
• Josephson Amplifier for Qubit Readout
• Design and characterization of a lumped element single-ended superconducting microwave parametric amplifier with on-chip flux bias line
• Frequency-dependent admittance of a short superconducting weak link
• Coupling microwave photons to a mechanical resonator using quantum interference
• Tunable Nb superconducting resonators based upon a Ne-FIB-fabricated constriction nanoSQUID
• A dispersive nanoSQUID magnetometer for ultra-low noise, high bandwidth flux detection
• Low-Loss Superconducting Nanowire Circuits Using a Neon Focused Ion Beam
• Realization of a Carbon-Nanotube-Based Superconducting Qubit
• Josephson diode effect in monolithic dc-SQUIDs based on 3D Dayem nanobridges
• Four-wave-cooling to the single phonon level in Kerr optomechanics
• Rabi oscillations in a superconducting nanowire circuit
• Initial Design of a W-band Superconducting Kinetic Inductance Qubit (Kineticon)
• Existence of Shapiro Steps in the Dissipative Regime in Superconducting Weak Links
• In-Plane Magnetic Field Tolerance of a Dispersive Aluminum Nanobridge SQUID Magnetometer
• Cooling photon-pressure circuits into the quantum regime
• Quasiparticle dynamics in epitaxial Al-InAs planar Josephson junctions
• Continuous Real-Time Detection of Quasiparticle Trapping in Aluminum Nanobridge Josephson Junctions
• Controllable tunnelling of single flux-quanta mediated by quantum phase-slip in disordered superconducting loops
• Millikelvin Nb nanoSQUID-embedded tuneable resonator fabricated with a neon focused-ion-beam
• Strong effects of weak ac driving in short superconducting junctions
• Electron-phonon interactions in the Andreev Bound States of aluminum nanobridge Josephson junctions