Implementation of a transmon qubit using superconducting granular aluminum

Abstract

The high kinetic inductance offered by granular aluminum (grAl) has recently been employed for linear inductors in superconducting high-impedance qubits and kinetic inductance detectors. Due to its large critical current density compared to typical Josephson junctions, its resilience to external magnetic fields, and its low dissipation, grAl may also provide a robust source of non-linearity for strongly driven quantum circuits, topological superconductivity, and hybrid systems. Having said that, can the grAl non-linearity be sufficient to build a qubit? Here we show that a small grAl volume ($10\times 200\times 500\mathrm{n}{\mathrm{m}}^3$) shunted by a thin film aluminum capacitor results in a microwave oscillator with anharmonicity $\alpha$ two orders of magnitude larger than its spectral linewidth ${\Gamma }_{01}$, effectively forming a transmon qubit. With increasing drive power, we observe several multi-photon transitions starting from the ground state, from which we extract $\alpha =2\pi \times 4.48\mathrm{MHz}$. Resonance fluorescence measurements of the $|0>\to |1>$ transition yield an intrinsic qubit linewidth $\gamma =2\pi \times 10\mathrm{kHz}$, corresponding to a lifetime of $16\mu \mathrm{s}$. This linewidth remains below $2\pi \times 150\mathrm{kHz}$ for in-plane magnetic fields up to $\sim 70\mathrm{mT}$.

arXiv comment5 + 8 Pages and 5 + 10 Figures

References in corpus (66)

• Charge insensitive qubit design derived from the Cooper pair box
• Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
• QuTiP 2: A Python framework for the dynamics of open quantum systems
• QuTiP: An open-source Python framework for the dynamics of open quantum systems
• A Quantum Engineer's Guide to Superconducting Qubits
• Introduction to Quantum Noise, Measurement and Amplification
• Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
• Observation of high coherence in Josephson junction qubits measured in a three-dimensional circuit QED architecture
• Decoherence in Josephson Qubits from Dielectric Loss
• Simple pulses for elimination of leakage in weakly nonlinear qubits
• Landau-Zener-Stuckelberg interferometry
• Fluxonium: single Cooper pair circuit free of charge offsets
• Resonance Fluorescence of a Single Artificial Atom
• Towards understanding two-level-systems in amorphous solids -- Insights from quantum circuits
• Mach-Zehnder Interferometry in a Strongly Driven Superconducting Qubit
• A Coherent Spin-Photon Interface in Silicon
• Hybrid quantum circuit with a superconducting qubit coupled to a spin ensemble
• Evidence of topological superconductivity in planar Josephson junctions
• Strong spin-photon coupling in silicon
• Operating Quantum States in Single Magnetic Molecules: Implementation of Grover's Quantum Algorithm
• Fluctuations of Energy-Relaxation Times in Superconducting Qubits
• To catch and reverse a quantum jump mid-flight
• Engineering the quantum states of light in a Kerr-nonlinear resonator by two-photon driving
• High Kinetic Inductance Superconducting Nanowire Resonators for Circuit QED in a Magnetic Field
• Landau-Zener interferometry with superconducting qubits
• Millisecond charge-parity fluctuations and induced decoherence in a superconducting qubit
• Coherent spin-qubit photon coupling
• Measurement and Control of Quasiparticle Dynamics in a Superconducting Qubit
• Granular aluminum: A superconducting material for high impedance quantum circuits
• Correlating decoherence in transmon qubits: Low frequency noise by single fluctuators
• Reaching the quantum limit of sensitivity in electron spin resonance
• Quasiparticle dynamics in granular aluminum close to the superconductor to insulator transition
• Measurement of Autler-Townes and Mollow transitions in a strongly driven superconducting qubit
• Number fluctuations of sparse quasiparticles in a superconductor
• Controlling spin relaxation with a cavity
• Microwave response of vortices in superconducting thin films of Re and Al
• Coherence times of dressed states of a superconducting qubit under extreme driving
• Electric field spectroscopy of material defects in transmon qubits
• Circuit Quantum Electrodynamics of Granular Aluminum Resonators
• Entangling Bosonic Modes via an Engineered Exchange Interaction
• Controlling the dynamic range of a Josephson parametric amplifier
• High Kinetic Inductance NbN Nanowire Superinductors
• Shaping a superconducting dome: Enhanced Cooper-pairing versus suppressed phase coherence in coupled aluminum nanograins
• Kerr-free three-wave mixing in superconducting quantum circuits
• Phonon traps reduce the quasiparticle density in superconducting circuits
• Atomic layer deposition of titanium nitride for quantum circuits
• Suppression of 1/f noise in solid state quantum devices by surface spin desorption
• Probing dynamics of an electron-spin ensemble via a superconducting resonator
• Consistency of ground state and spectroscopic measurements on flux qubits
• A graphene transmon operating at 1 T
• Interplay between kinetic inductance, non-linearity and quasiparticle dynamics in granular aluminum MKIDs
• Fast high fidelity quantum non-demolition qubit readout via a non-perturbative cross-Kerr coupling
• Dynamics of coherent and incoherent emission from an artificial atom in a 1D space
• Mitigation of Cosmic Ray Effect on Microwave Kinetic Inductance Detector Arrays
• Multi-photon dressing of an anharmonic superconducting many-level quantum circuit
• Non-degenerate parametric amplifiers based on dispersion engineered Josephson junction arrays
• Inductively shunted transmon qubit with tunable transverse and longitudinal coupling
• Microresonators fabricated from high-kinetic-inductance Aluminum films
• Granular Aluminum Meandered Superinductors for Quantum Circuits
• Efficient quasiparticle traps with low dissipation through gap engineering
• Magnetic Field Dependent Microwave Losses in Superconducting Niobium Microstrip Resonators
• Simultaneous monitoring of fluxonium qubits in a waveguide
• Transmon Qubit in a Magnetic Field: Evolution of Coherence and Transition Frequency
• An argon ion beam milling process for native ${\text{AlO}}_{\text{x}}$ layers enabling coherent superconducting contacts
• Rabi oscillations in a superconducting nanowire circuit
• Onset of phase diffusion in high kinetic inductance granular aluminum micro-SQUIDs

Cited by in corpus (31)

• Transmon qubit with relaxation time exceeding 0.5 milliseconds
• A gate-tunable, field-compatible fluxonium
• Superconducting granular aluminum resonators resilient to magnetic fields up to 1 Tesla
• Evolution of $1/f$ Flux Noise in Superconducting Qubits with Weak Magnetic Fields
• Gralmonium: Granular Aluminum Nano-Junction Fluxonium Qubit
• Fano Interference in Microwave Resonator Measurements
• Granular superconductors for high kinetic inductance and low loss quantum devices
• High-kinetic inductance NbN films for high-quality compact superconducting resonators
• Magnetic-field resilience of 3D transmons with thin-film Al/AlO${}_x$/Al Josephson junctions approaching 1 T
• Microscopic charging and in-gap states in superconducting granular aluminum
• Tuning microwave losses in superconducting resonators
• Nonlinearity and Parametric Amplification of Superconducting Nanowire Resonators in Magnetic Field
• Tuning Superinductors by Quantum Coherence Effects for Enhancing Quantum Computing
• Tuning the superconducting dome in granular aluminum thin films
• Manufacturing high-Q superconducting α-tantalum resonators on silicon wafers
• Superconductivity from a melted insulator
• Granular Aluminum Parametric Amplifier for Low-Noise Measurements in Tesla Fields
• Thermometry Based on a Superconducting Qubit
• Collateral coupling between superconducting resonators: Fast and high fidelity generation of qudit-qudit entanglement
• Multiphoton resonance in a driven Kerr oscillator in presence of high-order nonlinearities
• Floquet expansion by counting pump photons
• Landau-Zener without a Qubit: Unveiling Multiphoton Interference, Synthetic Floquet Dimensions, and Dissipative Quantum Chaos
• Local bistability under microwave heating for spatially mapping disordered superconductors
• Superconducting microwave magnetometer for absolute flux detection
• Influence of growth parameters on the superconducting transition temperature in granular aluminum films
• Simultaneous sweet-spot locking of gradiometric fluxonium qubits
• High Impedance Granular Aluminum Ring Resonators
• Time domain non-linear quantum interferometry
• Study of Magnetic Field Resilient High Impedance High-Kinetic Inductance Superconducting Resonators
• Encapsulation epitaxy of air-stable monolayer superconducting films for quantum circuits and qubits
• A CMOS compatible platform for high impedance superconducting quantum circuits