Kinetics of non-equilibrium quasiparticle tunneling in superconducting charge qubits

Abstract

We directly observe low-temperature non-equilibrium quasiparticle tunneling in a pair of charge qubits based on the single Cooper-pair box. We measure even- and odd-state dwell time distributions as a function of temperature, and interpret these results using a kinetic theory. While the even-state lifetime is exponentially distributed, the odd-state distribution is more heavily weighted to short times, implying that odd-to-even tunnel events are not described by a homogenous Poisson process. The mean odd-state dwell time increases sharply at low temperature, which is consistent with quasiparticles tunneling out of the island before reaching thermal equilibrium.

Replaced Figure 1 with color version, corrected more typos. Version submitted to PRB

References in corpus (9)

• Quasiparticle decay rate of Josephson charge qubit oscillations
• Microsecond resolution of quasiparticle tunneling in the single-Cooper-pair-transistor
• Kinetics of the superconducting charge qubit in the presence of a quasiparticle
• Time-domain measurements of quasiparticle tunneling rates in a single-Cooper-pair transistor
• A quantitative study of quasiparticle traps using the single-Cooper-pair-transistor
• Parity effect in superconducting aluminum single electron transistors with spatial gap profile controlled by film thickness
• Kinetics of quasiparticle trapping in a Cooper-pair box
• Narrow band microwave radiation from a biased single-Cooper-pair transistor
• Effect of quantum fluctuations on even-odd energy difference in a Cooper-pair box

Cited by in corpus (28)

• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Majorana qubit decoherence by quasiparticle poisoning
• Number fluctuations of sparse quasiparticles in a superconductor
• Micrometre-scale refrigerators
• Non-Poissonian Quantum Jumps of a Fluxonium Qubit due to Quasiparticle Excitations
• Decoherence of Majorana qubits by noisy gates
• Coexistence of nonequilibrium density and equilibrium energy distribution of quasiparticles in a superconducting qubit
• Distinguishing parity-switching mechanisms in a superconducting qubit
• Optimal configurations for normal-metal traps in transmon qubits
• Dynamics of parametric fluctuations induced by quasiparticle tunneling in superconducting flux qubits
• Fast readout of a single Cooper-pair box using its quantum capacitance
• Characterization of Shapiro steps in the presence of a 4π-periodic Josephson current
• Single Cooper-pair pumping in the adiabatic limit and beyond
• Fractional Josephson effect versus fractional charge in superconducting-normal metal hybrid circuits
• Evolution of $4\pi$-periodic Supercurrent in the Presence of In-plane Magnetic Field
• Quasiparticle dynamics in a superconducting qubit irradiated by a localized infrared source
• The parity effect in Josephson junction arrays
• Electrostatic control of quasiparticle poisoning in a hybrid semiconductor-superconductor island
• Full counting statistics in a Majorana single-charge transistor
• An engineering guide to superconducting quantum circuit shielding
• Quasiparticle poisoning in trivial and topological Josephson junctions
• Recovery dynamics of a gap-engineered transmon after a quasiparticle burst
• A superconductor free of quasiparticles for seconds
• Hydrogen crystals reduce dissipation in superconducting resonators
• Quasiparticle-induced decoherence of a driven superconducting qubit
• A High-Performance Training-Free Pipeline for Robust Random Telegraph Signal Characterization via Adaptive Wavelet-Based Denoising and Bayesian Digitization Methods
• The Quantum Capacitor Detector: A Single Cooper Pair Box Based Readout for Pair Breaking Photo-detectors
• Electron-phonon interactions in the Andreev Bound States of aluminum nanobridge Josephson junctions