Detecting parity effect in a superconducting device in the presence of parity switches

Abstract

We present a superconducting device showing a clear parity effect in the number of electrons, even when there is, on average, a single nonequilibrium quasiparticle present and the parity of the island switches due to quasiparticles tunneling in and out of the device at rates on the order of 100 Hz. We detect the switching by monitoring in real time the charge state of a superconducting island connected to normal leads by tunnel junctions. The quasiparticles are created by Cooper pairs breaking on the island at a rate of a few kHz. We demonstrate that the pair breaking is caused by the backaction of the single-electron transistor used as a charge detector. With sufficiently low probing currents, our superconducting island is free of quasiparticles 97% of the time.

arXiv commentSupplementary material included

References in corpus (36)

• Scalable Designs for Quasiparticle-Poisoning-Protected Topological Quantum Computation with Majorana Zero Modes
• Milestones toward Majorana-based quantum computing
• Majorana qubit decoherence by quasiparticle poisoning
• Millisecond charge-parity fluctuations and induced decoherence in a superconducting qubit
• Nonequilibrium quasiparticles and $2e$ periodicity in single-Cooper-pair transistors
• Loss and decoherence due to stray infrared light in superconducting quantum circuits
• Hot non-equilibrium quasiparticles in transmon qubits
• Parity lifetime of bound states in a proximitized semiconductor nanowire
• Quasiparticle dynamics in granular aluminum close to the superconductor to insulator transition
• Number fluctuations of sparse quasiparticles in a superconductor
• Photon assisted tunneling as an origin of the Dynes density of states
• Quasiparticle relaxation of superconducting qubits in the presence of flux
• Fast electron thermometry towards ultra-sensitive calorimetric detection
• Selective Area Grown Semiconductor-Superconductor Hybrids: A Basis for Topological Networks
• Transport signatures of quasiparticle poisoning in a Majorana island
• Kinetics of non-equilibrium quasiparticle tunneling in superconducting charge qubits
• Energy decay and frequency shift of a superconducting qubit from non-equilibrium quasiparticles
• 1 minute parity lifetime of a NbTiN Cooper-pair transistor
• Vanishing quasiparticle density in a hybrid Al/Cu/Al single-electron transistor
• Phonon-Mediated Quasiparticle Poisoning of Superconducting Microwave Resonators
• Poisson transition rates from time-domain measurements with finite bandwidth
• Microsecond resolution of quasiparticle tunneling in the single-Cooper-pair-transistor
• 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
• Effect of Measurement on the Periodicity of the Coulomb Staircase of a Superconducting Box
• Incomplete measurement of work in a dissipative two level system
• Spin orbit coupling at the level of a single electron
• Probing quasiparticle excitations in a hybrid single electron transistor
• Footprints of hyperfine, spin-orbit, and decoherence effects in Pauli spin blockade
• Observation of 2e-periodic Supercurrents in Nanowire Single-Cooper-Pair Transistors
• Waiting time distribution revealing the internal spin dynamics in a double quantum dot
• Narrow band microwave radiation from a biased single-Cooper-pair transistor
• Design and operation of a microfabricated phonon spectrometer utilizing superconducting tunnel junctions as phonon transducers
• Parity effect and single-electron injection for Josephson-junction chains deep in the insulating state
• A hybrid superconductor-normal metal electron trap as a photon detector
• Periodicity in Al/Ti superconducting single electron transistors

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• Electrostatic control of quasiparticle poisoning in a hybrid semiconductor-superconductor island
• Testing spontaneous wavefunction collapse with quantum electromechanics
• Flip-chip-based fast inductive parity readout of a planar superconducting island
• A self-calibrating superconducting pair-breaking detector
• A superconductor free of quasiparticles for seconds
• Time-dependent driving and topological protection in the fractional Josephson effect