Observation of classical-quantum crossover of 1/f flux noise and its paramagnetic temperature dependence

Abstract

By analyzing the dissipative dynamics of a tunable gap flux qubit, we extract both sides of its two-sided environmental flux noise spectral density over a range of frequencies around $2k_{B}T/h\approx 1\mathrm{GHz}$, allowing for the observation of a classical-quantum crossover. Below the crossover point, the symmetric noise component follows a $1/f$ power law that matches the magnitude of the $1/f$ noise near $1\mathrm{Hz}$. The antisymmetric component displays a 1/T dependence below $100\mathrm{mK}$, providing dynamical evidence for a paramagnetic environment. Extrapolating the two-sided spectrum predicts the linewidth and reorganization energy of incoherent resonant tunneling between flux qubit wells.

arXiv commentpaper + supplement

References in corpus (36)

• Charge insensitive qubit design derived from the Cooper pair box
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Decoherence in Josephson Qubits from Dielectric Loss
• Coherent Josephson qubit suitable for scalable quantum integrated circuits
• The Flux Qubit Revisited to Enhance Coherence and Reproducibility
• Decoherence of flux qubits due to 1/f flux noise
• Quantum noise in the Josephson charge qubit
• Millisecond charge-parity fluctuations and induced decoherence in a superconducting qubit
• Relaxation and frequency shifts induced by quasiparticles in superconducting qubits
• Loss and decoherence due to stray infrared light in superconducting quantum circuits
• Measurement and Control of Quasiparticle Dynamics in a Superconducting Qubit
• Computational Role of Multiqubit Tunneling in a Quantum Annealer
• 1/f Flux Noise in Josephson Phase Qubits
• Thermal and Residual Excited-State Population in a 3D Transmon Qubit
• Detection of Quantum Noise from an Electrically-Driven Two-Level System
• Magnetism in SQUIDs at Millikelvin Temperatures
• Origin and Suppression of $1/f$ Magnetic Flux Noise
• Rotating-frame relaxation as a noise spectrum analyzer of a superconducting qubit undergoing driven evolution
• Non-Poissonian Quantum Jumps of a Fluxonium Qubit due to Quasiparticle Excitations
• Microscopic origin of low frequency flux noise in Josephson circuits
• Fabrication and Characterization of Aluminum Airbridges for Superconducting Microwave Circuits
• Photon shell game in three-resonator circuit quantum electrodynamics
• Measurement-induced qubit state mixing in circuit QED from up-converted dephasing noise
• Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit
• Energy decay and frequency shift of a superconducting qubit from non-equilibrium quasiparticles
• Flux qubit noise spectroscopy using Rabi oscillations under strong driving conditions
• Multiplexed dispersive readout of superconducting phase qubits
• Direct identification of dilute surface spins on Al${}_2$O${}_3$: Origin of flux noise in quantum circuits
• Probing Noise in Flux Qubits via Macroscopic Resonant Tunneling
• Geometrical dependence of low frequency noise in superconducting flux qubits
• Excitation of superconducting qubits from hot non-equilibrium quasiparticles
• Candidate source of flux noise in SQUIDs: adsorbed oxygen molecules
• Macroscopic Resonant Tunneling in the Presence of Low Frequency Noise
• Evidence for temperature dependent spin-diffusion as a mechanism of intrinsic flux noise in SQUIDs
• Probing High Frequency Noise with Macroscopic Resonant Tunneling
• Readout for Phase Qubits without Josephson Junctions

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