Quasiparticle relaxation of superconducting qubits in the presence of flux

Abstract

Quasiparticle tunneling across a Josephson junction sets a limit for the lifetime of a superconducting qubit state. We develop a general theory of the corresponding decay rate in a qubit controlled by a magnetic flux. The flux affects quasiparticles tunneling amplitudes, thus making the decay rate flux-dependent. The theory is applicable for an arbitrary quasiparticle distribution. It provides estimates for the rates in practically important quantum circuits and also offers a new way of measuring the phase-dependent admittance of a Josephson junction.

arXiv comment4.5 pages, 1 figure; minor changes to text & references, to appear in Phys. Rev. Lett

References in corpus (10)

• Charge insensitive qubit design derived from the Cooper pair box
• Fluxonium: single Cooper pair circuit free of charge offsets
• A Superconducting Persistent Current Qubit
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• Controlling the spontaneous emission of a superconducting transmon qubit
• Decoherence in Josephson Qubits from Junction Resonances
• Charging effects in the inductively shunted Josephson junction
• Quasiparticle decay rate of Josephson charge qubit oscillations
• Effect of Quasiparticles Injection on the AC Response of a Superconductor
• Superconducting phase qubit based on the Josephson oscillator with strong anharmonicity

Cited by in corpus (127)

• A Quantum Engineer's Guide to Superconducting Qubits
• Observation of high coherence in Josephson junction qubits measured in a three-dimensional circuit QED architecture
• 1/f noise: implications for solid-state quantum information
• The Flux Qubit Revisited to Enhance Coherence and Reproducibility
• Engineering cryogenic setups for 100-qubit scale superconducting circuit systems
• Majorana qubit decoherence by quasiparticle poisoning
• Millisecond charge-parity fluctuations and induced decoherence in a superconducting qubit
• The high-coherence fluxonium qubit
• Relaxation and frequency shifts induced by quasiparticles in superconducting qubits
• Coherence and Decay of Higher Energy Levels of a Superconducting Transmon Qubit
• Resolving catastrophic error bursts from cosmic rays in large arrays of superconducting qubits
• Protecting superconducting qubits from external sources of loss and heat
• Number fluctuations of sparse quasiparticles in a superconductor
• Thermal and Residual Excited-State Population in a 3D Transmon Qubit
• Photon Shot Noise Dephasing in the Strong-Dispersive Limit of Circuit QED
• Flux Qubits with Long Coherence Times for Hybrid Quantum Circuits
• Suppressing relaxation in superconducting qubits by quasiparticle pumping
• Non-Poissonian Quantum Jumps of a Fluxonium Qubit due to Quasiparticle Excitations
• Digital coherent control of a superconducting qubit
• Fluctuations in the electron system of a superconductor exposed to a photon flux
• High fidelity two-qubit gates on fluxoniums using a tunable coupler
• Protecting a superconducting qubit from energy decay by selection rule engineering
• Measurements of Quasiparticle Tunneling Dynamics in a Bandgap-Engineered Transmon Qubit
• Energy decay and frequency shift of a superconducting qubit from non-equilibrium quasiparticles
• Vanishing quasiparticle density in a hybrid Al/Cu/Al single-electron transistor
• Phonon traps reduce the quasiparticle density in superconducting circuits
• Decoherence of superconducting qubits caused by quasiparticle tunneling
• Scalable High-Performance Fluxonium Quantum Processor
• Normal-metal quasiparticle traps for superconducting qubits
• Quantum Memristors with Superconducting Circuits
• Phonon-Mediated Quasiparticle Poisoning of Superconducting Microwave Resonators
• Engineering superconducting qubits to reduce quasiparticles and charge noise
• Superconducting Memristors
• Phonon downconversion to suppress correlated errors in superconducting qubits
• Excitation of superconducting qubits from hot non-equilibrium quasiparticles
• Photon-assisted charge-parity jumps in a superconducting qubit
• Environmental Radiation Impact on Lifetimes and Quasiparticle Tunneling Rates of Fixed-Frequency Transmon Qubits
• Understanding degenerate ground states of a protected quantum circuit in the presence of disorder
• Coexistence of nonequilibrium density and equilibrium energy distribution of quasiparticles in a superconducting qubit
• Resisting high-energy impact events through gap engineering in superconducting qubit arrays
• Hardware-Encoding Grid States in a Non-Reciprocal Superconducting Circuit
• Microwave-induced excess quasiparticles in superconducting resonators measured through correlated conductivity fluctuations
• How many quasiparticles can be in a superconductor?
• Quasiparticles in superconducting qubits with asymmetric junctions
• High Coherence in a Tileable 3D Integrated Superconducting Circuit Architecture
• Improving qubit coherence using closed-loop feedback
• Realization of High-Fidelity CZ Gate based on a Double-Transmon Coupler
• A long-lived capacitively shunted flux qubit embedded in a 3D cavity
• Microwave photon detection at parametric criticality
• Electric field control of radiative heat transfer in a superconducting circuit
• Josephson Flux Flow Oscillator: the Microscopic Tunneling Approach
• Phonon engineering of atomic-scale defects in superconducting quantum circuits
• Efficient quasiparticle traps with low dissipation through gap engineering
• Parity switching and decoherence by quasiparticles in single-junction transmons
• Using materials for quasiparticle engineering
• Electronic Decoherence of Two-Level Systems in a Josephson Junction
• Fragility of multi-junction flux qubits against quasiparticle tunneling
• Dynamic parity recovery in a strongly driven Cooper-pair box
• Optimal configurations for normal-metal traps in transmon qubits
• Kondo physics from quasiparticle poisoning in Majorana devices
• A microkelvin cryogen-free experimental platform with integrated noise thermometry
• Single-photon detection with a Josephson junction coupled to a resonator
• Proximity effect in normal-metal quasiparticle traps
• Spectrum and Coherence Properties of the Current-Mirror Qubit
• Non-equilibrium quasiparticles in superconducting circuits: photons vs. phonons
• Self-consistent dynamics of a Josephson junction in presence of an arbitrary environment
• Photonic heat conduction in Josephson-coupled Bardeen-Cooper-Schrieffer superconductors
• Nonequilibrium heat transport and work with a single artificial atom coupled to a waveguide: emission without external driving
• Right-sizing fluxonium against charge noise
• Phase-dependent quasiparticle tunneling in Josephson junctions: Measuring the cos-phi term with a superconducting charge qubit
• Measuring effective temperatures of qubits using correlations
• Tunable superconducting flux qubits with long coherence times
• Active quasiparticle suppression in a non-equilibrium superconductor
• Entangled Quantum Memristors
• Second-order decoherence mechanisms of a transmon qubit probed with thermal microwave states
• Quantum bath engineering of a high impedance microwave mode through quasiparticle tunneling
• Measurement and dephasing of a flux qubit due to heat currents
• Tunable Coupler for Mediating Interactions between a Two-Level System and a Waveguide from a Decoupled State to the Ultra-Strong Coupling Regime
• Detecting parity effect in a superconducting device in the presence of parity switches
• Quasiparticle dynamics in epitaxial Al-InAs planar Josephson junctions
• Tripartite entanglement in quantum memristors
• Decay-protected superconducting qubit with fast control enabled by integrated on-chip filters
• The parity effect in Josephson junction arrays
• Building a bigger Hilbert space for superconducting devices, one Bloch state at a time
• Qubit dephasing due to Quasiparticle Tunneling
• The effect of environmental coupling on tunneling of quasiparticles in Josephson junctions
• Modeling Bloch Oscillations in Nanoscale Josephson Junctions
• Rate of tunneling nonequilibrium quasiparticles in superconducting qubits
• Dephasing due to quasiparticle tunneling in fluxonium qubits: a phenomenological approach
• Thermometry Based on a Superconducting Qubit
• Operating a passive on-chip superconducting circulator: device control and quasiparticle effects
• Dissipation in a superconducting artificial atom due to a single non-equilibrium quasiparticle
• Temporally correlated quantum noise in driven quantum systems
• Charge-parity switching effects and optimisation of transmon-qubit design parameters
• Continuous Real-Time Detection of Quasiparticle Trapping in Aluminum Nanobridge Josephson Junctions
• Dissipation by normal-metal traps in transmon qubits
• Cosmic muon flux attenuation methods for superconducting qubit experiments
• Spurious Antenna Modes of the Transmon Qubit
• A self-calibrating superconducting pair-breaking detector
• Effects of quasiparticle tunneling in a circuit-QED realization of a strongly driven two-level system
• Decoherence in a Pair of Long-Lived Cooper-Pair Boxes
• Cooper pair tunnelling and quasiparticle poisoning in a galvanically isolated superconducting double dot
• Protection of quantum information in a chain of Josephson junctions
• Dynamical spin polarization of excess quasi-particles in superconductors
• Nonequilibrium regimes for quasiparticles in superconducting qubits with gap-asymmetric junctions
• A quantum interface to charged particles in a vacuum
• Distortion of a reduced equilibrium density matrix: influence on quantum emulation
• Theory of quasiparticle-induced errors in driven-dissipative Schrödinger cat qubits
• A system design approach toward integrated cryogenic quantum control systems
• Noise Optimization for MKIDs with Different Design Geometries and Material Selections
• Super-Poissonian noise from quasiparticle poisoning in electron transport through a pair of Majorana bound states
• Phase-dependent noise in Josephson junctions
• In-situ tunable interaction with an invertible sign between a fluxonium and a post cavity
• Disentangling the Impact of Quasiparticles and Two-Level Systems on the Statistics of Superconducting Qubit Lifetime
• Universal quantum control over Majorana zero modes
• Quasiparticle Generation-Recombination Noise in the Limit of Low Detector Volume
• A practical guide for building superconducting quantum devices
• A superconductor free of quasiparticles for seconds
• Phase-dependent damping rate of Josephson plasmons in the nonequilibrium steady state
• Coherence-Mediated Quantum Thermometry in a Hybrid Circuit-QED Architecture
• Non-demolition fluorescence readout and high-fidelity unconditional reset of a fluxonium qubit via dissipation engineering
• Localized quasiparticles in a fluxonium with quasi-two-dimensional amorphous kinetic inductors
• Nonequilibrium Quasiparticles in Superconducting Circuits: Energy Relaxation, Charge and Flux Noise
• Hydrogen crystals reduce dissipation in superconducting resonators
• Protocol for temperature sensing using a three-level transmon circuit
• Dissipation and noise in strongly driven Josephson junctions
• Quasiparticle-induced decoherence of a driven superconducting qubit