Dephasing of a superconducting qubit induced by photon noise

Abstract

We have studied the dephasing of a superconducting flux-qubit coupled to a DC-SQUID based oscillator. By varying the bias conditions of both circuits we were able to tune their effective coupling strength. This allowed us to measure the effect of such a controllable and well-characterized environment on the qubit coherence. We can quantitatively account for our data with a simple model in which thermal fluctuations of the photon number in the oscillator are the limiting factor. In particular, we observe a strong reduction of the dephasing rate whenever the coupling is tuned to zero. At the optimal point we find a large spin-echo decay time of $4\mu s$.

arXiv commentNew version of earlier paper arXiv/0507290 after in-depth rewriting

References in corpus (16)

• Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Manipulating the Quantum State of an Electrical Circuit
• Coherent Quantum Dynamics of a Superconducting Flux Qubit
• Coherent dynamics of a flux qubit coupled to a harmonic oscillator
• AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
• Decoherence in Josephson Qubits from Junction Resonances
• Decoherence and 1/f noise in Josephson qubits
• Charge echo in a Cooper-pair box
• Coherent dynamics of a Josephson charge qubit
• Dephasing of solid-state qubits at optimal points
• NMR-like control of a quantum bit superconducting circuit
• Nondestructive readout for a superconducting flux qubit
• Coherent oscillations in a superconducting multi-level quantum system
• Asymmetry and decoherence in a double-layer persistent-current qubit
• Detection of a persistent-current qubit by resonant activation

Cited by in corpus (179)

• Quantum Computing
• Circuit Quantum Electrodynamics
• Superconducting Qubits: Current State of Play
• Atomic physics and quantum optics using superconducting circuits
• Microwave photonics with superconducting quantum circuits
• Simple pulses for elimination of leakage in weakly nonlinear qubits
• Observation of the Bloch-Siegert Shift in a Qubit-Oscillator System in the Ultrastrong Coupling Regime
• 1/f noise: implications for solid-state quantum information
• The Flux Qubit Revisited to Enhance Coherence and Reproducibility
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• Controlling the spontaneous emission of a superconducting transmon qubit
• Towards understanding two-level-systems in amorphous solids -- Insights from quantum circuits
• Quantum Decoherence
• Decoherence of flux qubits due to 1/f flux noise
• A Survey on Quantum Channel Capacities
• Low-decoherence flux qubit
• Coupling Nitrogen Vacancy Centers in Diamond to Superconducting Flux Qubits
• Loss and decoherence due to stray infrared light in superconducting quantum circuits
• Decoherence in Solid State Qubits
• Tuning the Gap of a Superconducting Flux Qubit
• Dephasing of a superconducting flux qubit
• Asymmetric quantum error correcting codes
• Two-resonator circuit QED: A superconducting quantum switch
• Two-photon quantum Rabi model with superconducting circuits
• Strong Coupling of a Quantum Oscillator to a Flux Qubit at its Symmetry Point
• Photon Shot Noise Dephasing in the Strong-Dispersive Limit of Circuit QED
• Flux Qubits with Long Coherence Times for Hybrid Quantum Circuits
• Optimal control of a qubit coupled to a non-Markovian environment
• Dispersive measurements of superconducting qubit coherence with a fast, latching readout
• Rotating-frame relaxation as a noise spectrum analyzer of a superconducting qubit undergoing driven evolution
• Minimal resonator loss for circuit quantum electrodynamics
• Controllable coupling between flux qubits
• Parametric coupling for superconducting qubits
• Preserving entanglement and nonlocality in solid-state qubits by dynamical decoupling
• Deterministic generation of large cluster states using non-deterministic collective measurements based on quantum Zeno effect
• Tunable coupling scheme for flux qubits at the optimal point
• Cavity Attenuators for Superconducting Qubits
• Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit
• Interface Between Topological and Superconducting Qubits
• Quantum simulator of an open quantum system using superconducting qubits: exciton transport in photosynthetic complexes
• Superconducting cavity qubit with tens of milliseconds single-photon coherence time
• Circuit QED and engineering charge based superconducting qubits
• Mitigating realistic noise in practical noisy intermediate-scale quantum devices
• Controllable Coupling between Flux Qubit and Nanomechanical Resonator by Magnetic Field
• Electromagnetically-induced transparency with amplification in superconducting circuits
• Temperature square dependence of the low frequency 1/f charge noise in the Josephson junction qubits
• Four-qubit device with mixed couplings
• Parametric coupling between macroscopic quantum resonators
• Measuring the Decoherence of a Quantronium Qubit with the Cavity Bifurcation Amplifier
• Optimized controlled Z gates for two superconducting qubits coupled through a resonator
• Efficient quantum circuits for one-way quantum computing
• Information entropic superconducting microcooler
• Superconducting qubits can be coupled and addressed as trapped ions
• Flux qubits in a planar circuit quantum electrodynamics architecture: quantum control and decoherence
• Two-resonator circuit QED: Dissipative Theory
• One- and two-photon spectroscopy of a flux qubit coupled to a microscopic defect
• Connecting nth order generalised quantum Rabi models: Emergence of nonlinear spin-boson coupling via spin rotations
• Transformed Dissipation in Superconducting Quantum Circuits
• Low-frequency Noise in Josephson Junctions for Superconducting Qubits
• Error correction optimisation in the presence of X/Z asymmetry
• Photon Statistics of Propagating Thermal Microwaves
• Probing the quantum coherence of a nanomechanical resonator using a superconducting qubit: I. Echo scheme
• Long-range coupling and scalable architecture for superconducting flux qubits
• Spectral Collapse in the two-photon quantum Rabi model
• Fidelity and quantum chaos in the mesoscopic device for the Josephson flux qubit
• Fast quantum limited read-out of a superconducting qubit using a slow oscillator
• Identifying a Two-State Hamiltonian in the Presence of Decoherence
• Protecting entanglement in superconducting qubits
• A long-lived capacitively shunted flux qubit embedded in a 3D cavity
• Dynamical Lamb Effect in a Tunable Superconducting Qubit-Cavity System
• Noise correlations in a flux qubit with tunable tunnel coupling
• Suppressing decoherence and improving entanglement by quantum-jump-based feedback control in two-level systems
• Phase-Coherent Dynamics of a Superconducting Flux Qubit with Capacitive-Bias Readout
• Towards Outperforming Classical Algorithms with Analog Quantum Simulators
• A metastable superconducting qubit
• Quantum Microwave Radiometry with a Superconducting Qubit
• Tunable-Cavity QED with Phase Qubits
• Spectroscopy of three strongly coupled flux qubits
• Primary thermometry of propagating microwaves in the quantum regime
• Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator
• Photon-noise-tolerant dispersive readout of a superconducting qubit using a nonlinear Purcell filter
• Generalized quantum Rabi model with both one- and two-photon terms: A concise analytical study
• Symmetry breaking patterns, tricriticalities and quadruple points in quantum Rabi model with bias and nonlinear interaction
• Analytic Design of Accelerated Adiabatic Gates in Realistic Qubits: General Theory and Applications to Superconducting Circuits
• Multiphoton resonance and chiral transport in the generalized Rabi model
• 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
• Tuned transition from quantum to classical for macroscopic quantum states
• Spectroscopy of superconducting charge qubits coupled by a Josephson inductance
• Cooling a micro-mechanical resonator by quantum back-action from a noisy qubit
• Hybrid quantum device with a carbon nanotube and a flux qubit for dissipative quantum engineering
• Decoherence in rf SQUID Qubits
• On the generation of multipartite entangled states in Josephson architectures
• Macroscopic Greenberger-Horne-Zeilinger and W States in Flux Qubits
• Fast multiplexed superconducting qubit readout with intrinsic Purcell filtering
• Intrinsic leakage of the Josephson flux qubit and breakdown of the two-level approximation for strong driving
• Dispersive Response of a Disordered Superconducting Quantum Metamaterial
• Photon-Dressed Bloch-Siegert Shift in an Ultrastrongly Coupled Circuit Quantum Electrodynamical System
• Quantum simulation of multiphoton and nonlinear dissipative spin-boson models
• Hybridized solid-state qubit in the charge-flux regime
• Full control of qubit rotations in a voltage-biased superconducting flux qubit
• Efficient quantum error correction of dephasing induced by a common fluctuator
• Dynamically enhancing qubit-photon interactions with anti-squeezing
• Large Amplitude Harmonic Driving of Highly Coherent Flux Qubits
• Double degeneracy associated with hidden symmetries in the asymmetric two-photon Rabi model
• Decoherence processes in a current biased dc SQUID
• Switchable coupling between charge and flux qubits
• Quantum nondemolition-like, fast measurement scheme for a superconducting qubit
• Coupling a single Nitrogen-Vacancy center to a superconducting flux qubit in the far off resonance regime
• Electronic structure of superposition states in flux qubits
• The mixed quantum Rabi model
• Characterization of hidden modes in networks of superconducting qubits
• Adiabatic quantum computation with flux qubits, first experimental results
• Second-order decoherence mechanisms of a transmon qubit probed with thermal microwave states
• Tunable superconducting flux qubits with long coherence times
• Measurement and dephasing of a flux qubit due to heat currents
• Phase-space theory for dispersive detectors of superconducting qubits
• Robust creation of entangled states of two coupled flux qubits via dynamic control of the transition frequencies
• Decoherence dynamics of a qubit coupled to a quantum two-level system
• Measurement of the ground-state flux diagram of three coupled qubits as a first step towards the demonstration of adiabatic quantum computation
• QND measurement of a superconducting qubit in the weakly projective regime
• Single-photon heat conduction in electrical circuits
• A superconducting qubit as a quantum transformer routing entanglement between a microscopic quantum memory and a macroscopic resonator
• Open quantum systems with nonlinear environmental backactions: Extended dissipaton theory versus core-system hierarchy construction
• Quantum Brownian motion at strong dissipation probed by superconducting tunnel junctions
• Analysis of measurement errors for a superconducting phase qubit
• Quantum heat diode versus light emission in circuit quantum electrodynamical system
• Reduced visibility of quantum oscillations in the spin-boson model
• Decoherence of floating qubits due to capacitive coupling
• Quasiparticle tunneling and 1/f charge noise in ultrastrongly coupled superconducting qubit and resonator
• Controllable Coupling in Phase-Coupled Flux Qubits
• Experimentally Realizable C-NOT Gate in a Flux Qubit/Resonator System
• Rate of tunneling nonequilibrium quasiparticles in superconducting qubits
• Tuning the universality class of phase transitions by feedback: Open quantum systems beyond dissipation
• Meissner transmon qubit - architecture and characterization
• Crossover from weak to strong coupling regime in dispersive circuit QED
• Investigation of resonant and transient phenomena in Josephson junction flux qubits
• Aluminum Josephson junction microstructure and electrical properties modification with thermal annealing
• Hot electron heatsinks for microwave attenuators below 100 mK
• Non-markovian dynamics of double quantum dot charge qubit with static bias
• Spatially-resolved decoherence of donor spins in silicon strained by a metallic electrode
• Quantum dissipation with nonlinear environment couplings: Stochastic fields dressed dissipaton equation of motion approach
• Reverse isolation and backaction of the SLUG microwave amplifier
• Synchronization of Networked Jahn-Teller Systems in Circuit QED
• Dispersive Charge and Flux Qubit Readout as a Quantum Measurement Process
• Non-Markovian coherence dynamics of driven spin boson model: damped quantum beat or large amplitude coherence oscillation
• Quantum chaos in the mesoscopic device for the Josephson flux qubit
• Qubit state detection using the quantum Duffing oscillator
• Quantum non-demolition measurements of a qubit coupled to a harmonic oscillator
• Non-Markovian qubit decoherence during dispersive readout
• Coherence properties of a spin in a squeezed resonator
• High-fidelity two-qubit gates via dynamical decoupling of local 1/f noise at optimal point
• Power-dependent internal loss in Josephson bifurcation amplifiers
• Time-resolved qubit readout via nonlinear Josephson inductance
• Control of transition frequency of a superconducting flux qubit by longitudinal coupling to the photon number degree of freedom in a resonator
• Strain designed Josephson $\pi$ junction qubits with topological insulators
• Noise-specific beats in the higher-level Ramsey curves of a transmon qubit
• Decoherence in a Pair of Long-Lived Cooper-Pair Boxes
• Generation of higher dimensional entangled states in quantum Rabi systems
• Impurity-Induced Environmental Quantum Phase Transitions in the Quadratic-Coupling Spin-Boson Model
• Parametric longitudinal coupling of a semiconductor charge qubit and a RF resonator
• Balanced cross-Kerr coupling for superconducting qubit readout
• Telegraph flux noise induced beating Ramsey fringe in transmon qubits
• Quantum decoherence dynamics in stochastically fluctuating environments
• Comparison of coherence times in three dc SQUID phase qubits
• Four-junction superconducting circuit
• Symmetry operators of the asymmetric two-photon quantum Rabi model
• Upgrading Quantum Metrology by Combined Sensitivity Resources in Mixed Linear-Nonlinear Light-Matter Interactions with Bias Field
• Observation of Higher-Order Sideband Transitions and First-Order Sideband Rabi Oscillations in a Superconducting Flux Qubit Coupled to a SQUID Plasma Mode
• Decoherence of a tunable capacitively shunted flux qubit
• Accelerating complex control schemes on a heterogeneous MPSoC platform for quantum computing
• Two-photon cooling of a nonlinear quantum oscillator
• Dynamical Correlation Functions of the Quadratic Coupling Spin-Boson Model
• Inducing nontrivial qubit coherence through a controlled dispersive environment
• Vacuum-fluctuation-induced Dephasing of a Qubit in Circuit Quantum Electrodynamics
• On-Chip Photonic Transistor based on the Spike Synchronization in Circuit QED
• Readout of superconducting flux qubit state with a Cooper pair box
• Flexible Fault Tolerant Gate Gadgets