Decoherence of flux qubits due to 1/f flux noise

Abstract

We have investigated decoherence in Josephson-junction flux qubits. Based on the measurements of decoherence at various bias conditions, we discriminate contributions of different noise sources. In particular, we present a Gaussian decay function of the echo signal as evidence of dephasing due to $1/f$ flux noise whose spectral density is evaluated to be about $(10^{-6}{\Phi }_0{)}^2$/Hz at 1 Hz. We also demonstrate that at an optimal bias condition where the noise sources are well decoupled the coherence observed in the echo measurement is mainly limited by energy relaxation of the qubit.

4 pages, error in Fig.4 corrected, to appear in PRL

References in corpus (3)

• Dephasing of solid-state qubits at optimal points
• Asymmetry and decoherence in a double-layer persistent-current qubit
• Decoherence processes in a current biased dc SQUID

Cited by in corpus (125)

• Charge insensitive qubit design derived from the Cooper pair box
• Microwave photonics with superconducting quantum circuits
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• How to Enhance Dephasing Time in Superconducting Qubits
• Quantum Decoherence
• Low-decoherence flux qubit
• Realization of high-fidelity CZ and ZZ-free iSWAP gates with a tunable coupler
• Model for l/f Flux Noise in SQUIDs and Qubits
• 1/f Flux Noise in Josephson Phase Qubits
• Tuning the Gap of a Superconducting Flux Qubit
• Dephasing of a superconducting flux qubit
• Two-resonator circuit QED: A superconducting quantum switch
• Magnetism in SQUIDs at Millikelvin Temperatures
• Strong Coupling of a Quantum Oscillator to a Flux Qubit at its Symmetry Point
• Decoherence in qubits due to low-frequency noise
• Fluxonium: an alternative qubit platform for high-fidelity operations
• Microscopic origin of low frequency flux noise in Josephson circuits
• Observation of classical-quantum crossover of 1/f flux noise and its paramagnetic temperature dependence
• A superconducting qubit with Purcell protection and tunable coupling
• Experimental determination of the Berry phase in a superconducting charge pump
• Tutorial: Gate-based superconducting quantum computing
• Dangling-bond spin relaxation and magnetic 1/f noise from the amorphous-semiconductor/oxide interface: Theory
• Preserving entanglement and nonlocality in solid-state qubits by dynamical decoupling
• Measurement-induced qubit state mixing in circuit QED from up-converted dephasing noise
• Suppression of Unwanted $ZZ$ Interactions in a Hybrid Two-Qubit System
• Life after charge noise: recent results with transmon qubits
• Characterizing and optimizing qubit coherence based on SQUID geometry
• Decoherence of superconducting qubits caused by quasiparticle tunneling
• Circuit quantization in the presence of time-dependent external flux
• Mitigating realistic noise in practical noisy intermediate-scale quantum devices
• Ultrasensitive magnetic field detection using a single artificial atom
• Probing Noise in Flux Qubits via Macroscopic Resonant Tunneling
• Long-distance transmon coupler with CZ gate fidelity above $99.8\%$
• Optimized pulse shapes for a resonator-induced phase gate
• Geometrical dependence of low frequency noise in superconducting flux qubits
• Spin-like susceptibility of metallic and insulating thin films at low temperature
• Information entropic superconducting microcooler
• Engineering Dynamical Sweet Spots to Protect Qubits from 1/$f$ Noise
• Engineering decoherence for two-qubit systems interacting with a classical environment
• The upside of noise: engineered dissipation as a resource in superconducting circuits
• Universal control of a bosonic mode via drive-activated native cubic interactions
• Evolution of $1/f$ Flux Noise in Superconducting Qubits with Weak Magnetic Fields
• Multi-output microwave single-photon source using superconducting circuits with longitudinal and transverse couplings
• A long-lived capacitively shunted flux qubit embedded in a 3D cavity
• Universal non-adiabatic control of small-gap superconducting qubits
• Phase-Coherent Dynamics of a Superconducting Flux Qubit with Capacitive-Bias Readout
• Phonon engineering of atomic-scale defects in superconducting quantum circuits
• Exact solution of a model of qubit dephasing due to telegraph noise
• Ultrafast dynamics of photoinduced charge separation
• Correlated flux noise and decoherence in two inductively coupled flux qubits
• Cooling of a Micro-mechanical Resonator by the Back-action of Lorentz Force
• Spectroscopy of three strongly coupled flux qubits
• Modular quantum processor with an all-to-all reconfigurable router
• Non-Gaussian dephasing in flux qubits due to 1/f-noise
• Relationship between costs for quantum error mitigation and non-Markovian measures
• Optimal control for fast and high-fidelity quantum gates in coupled superconducting flux qubits
• Spectroscopy of superconducting charge qubits coupled by a Josephson inductance
• Noise Spectroscopy Using Correlations of Single-Shot Qubit Readout
• Fabrication Technology of and Symmetry Breaking in Superconducting Quantum Circuits
• Probing High Frequency Noise with Macroscopic Resonant Tunneling
• Positive- and negative-frequency noise from an ensemble of two-level fluctuators
• Electron Spin Resonance with up to 20 Spin Sensitivity Measured using a Superconducting Flux Qubit
• Full control of qubit rotations in a voltage-biased superconducting flux qubit
• Large Amplitude Harmonic Driving of Highly Coherent Flux Qubits
• Suppressing Coherent Two-Qubit Errors via Dynamical Decoupling
• Finite sizes and smooth cutoffs in superconducting circuits
• Hamiltonian of a flux qubit-LC oscillator circuit in the deep-strong-coupling regime
• Stabilizing and improving qubit coherence by engineering noise spectrum of two-level systems
• High coherence fluxonium manufactured with a wafer-scale uniformity process
• Tunable superconducting flux qubits with long coherence times
• Effects of surface treatments on flux tunable transmon qubits
• Robust creation of entangled states of two coupled flux qubits via dynamic control of the transition frequencies
• Efficient detection of inhomogeneous magnetic fields from a single spin with Dicke states
• Nonequilibrium Spin Noise and Noise of Susceptibility
• Decoherence induced by a sparse bath of two-level fluctuators: peculiar features of $1/f$ noise in high-quality qubits
• Non-Hermitian approach for modeling of noise-assisted quantum electron transfer in photosynthetic complexes
• 1/f Noise from the Laws of Thermodynamics for Finite-Size Fluctuations
• Anneal-path correction in flux qubits
• Entanglement-enhanced sensing using a chain of qubits with always-on nearest-neighbor interactions
• Preparing ground states of the XXZ model using the quantum annealing with inductively coupled superconducting flux qubits
• An Ising-Glauber Spin Cluster Model for Temperature Dependent Magnetization Noise in SQUIDs
• Reverse engineering of one-qubit filter functions with dynamical invariants
• Visibility of noisy quantum dot-based measurements of Majorana qubits
• Efficient decoupling of a non-linear qubit mode from its environment
• Lasing in circuit quantum electrodynamics with strong noise
• Stabilizing two-qubit entanglement with dynamically decoupled active feedback
• Exact decoherence dynamics of $1/f$ noise
• Quantum metrology based on symmetry-protected adiabatic transformation: Imperfection, finite time duration, and dephasing
• Spin Environment of a Superconducting Qubit in High Magnetic Fields
• A superconducting circuit realization of combinatorial gauge symmetry
• Spatially-resolved decoherence of donor spins in silicon strained by a metallic electrode
• Flux-pulse-assisted Readout of a Fluxonium Qubit
• Demonstration of long-range correlations via susceptibility measurements in a one-dimensional superconducting Josephson spin chain
• Symmetrically Threaded Superconducting Quantum Interference Devices As Next Generation Kerr-cat Qubits
• Coupling mechanism between microscopic two-level system and superconducting qubits
• Coherent errors in stabilizer codes caused by quasistatic phase damping
• Robust gates with spin-locked superconducting qubits
• Dissipative Landau-Zener tunneling in the crossover regime from weak to strong environment coupling
• On open quantum systems, effective Hamiltonians and device characterization
• Flux qubit-based detector of microwave photons
• Quantum coherence dynamics of displaced squeezed thermal state in a Non-Markovian environment
• Coherent oscillations between classically separable quantum states of a superconducting loop
• How to experimentally evaluate the adiabatic condition for quantum annealing
• Telegraph flux noise induced beating Ramsey fringe in transmon qubits
• Quantum decoherence dynamics in stochastically fluctuating environments
• Memory effects in high-dimensional systems faithfully identified by Hilbert-Schmidt speed-based witness
• Protection of quantum information in a chain of Josephson junctions
• Engineering Bosonic Codes with Quantum Lattice Gates
• Consistent perturbative treatment of the subohmic spin-boson model yielding arbitrarily small $T_2/T_1$ decoherence time ratios
• Flux control of superconducting qubits at dynamical sweet spots
• Open-loop quantum control of small-size networks for high-order cumulants and cross-correlations sensing
• Coherent interaction-free detection of noise
• Detector of microwave photon pairs based on a Josephson photomultiplier
• Decoherence of a tunable capacitively shunted flux qubit
• Non-adiabatic holonomic manipulation of the polariton qubit in circuit QED
• Nonclassical radiation from a nonlinear oscillator driven solely by classical $1/f$ noise
• Characterization of multi-level dynamics and decoherence in a high-anharmonicity capacitively shunted flux circuit
• Causal State Estimation and the Heisenberg Uncertainty Principle
• Optimization of Floquet fluxonium qubits with commensurable two-tone drives
• Arbitrary gauge quantisation of light-matter theories with time-dependent constraints
• On-chip microwave coherent source with in-situ control of the photon number distribution
• Non-Markovianity Benefits Quantum Dynamics Simulation
• Orbital-Angular-Momentum Entangled Photon Emission from Circular Currents in Semiconductor-Superconductor Structures
• Robust multi-mode superconducting circuit optimized for quantum information processing