Gatemon Benchmarking and Two-Qubit Operation

Abstract

Recent experiments have demonstrated superconducting transmon qubits with semiconductor nanowire Josephson junctions. These hybrid gatemon qubits utilize field effect tunability characteristic for semiconductors to allow complete qubit control using gate voltages, potentially a technological advantage over conventional flux-controlled transmons. Here, we present experiments with a two-qubit gatemon circuit. We characterize qubit coherence and stability and use randomized benchmarking to demonstrate single-qubit gate errors below 0.7% for all gates, including voltage-controlled $Z$ rotations. We show coherent capacitive coupling between two gatemons and coherent swap operations. Finally, we perform a two-qubit controlled-phase gate with an estimated fidelity of 91%, demonstrating the potential of gatemon qubits for building scalable quantum processors.

References in corpus (28)

• Charge insensitive qubit design derived from the Cooper pair box
• Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
• Coupling Superconducting Qubits via a Cavity Bus
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Randomized Benchmarking of Quantum Gates
• State preservation by repetitive error detection in a superconducting quantum circuit
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Coherent Josephson qubit suitable for scalable quantum integrated circuits
• Coherent manipulation of electronic states in a double quantum dot
• Qubit architecture with high coherence and fast tunable coupling
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• Epitaxy of Semiconductor-Superconductor nanowires
• Tunable Supercurrent Through Semiconductor Nanowires
• Efficient measurement of quantum gate error by interleaved randomized benchmarking
• A Semiconductor Nanowire-Based Superconducting Qubit
• Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits
• Quantum Coherence in a One-Electron Semiconductor Charge Qubit
• Quantum control and process tomography of a semiconductor quantum dot hybrid qubit
• Realization of microwave quantum circuits using hybrid superconducting-semiconducting nanowire Josephson elements
• Microwave Dielectric Loss at Single Photon Energies and milliKelvin Temperatures
• Optimal quantum control using randomized benchmarking
• Suppressing qubit dephasing using real-time Hamiltonian estimation
• Tunable coupling in circuit quantum electrodynamics with a superconducting V-system
• Characterizing errors on qubit operations via iterative randomized benchmarking
• Fabrication and Characterization of Aluminum Airbridges for Superconducting Microwave Circuits
• High-fidelity gates in a Josephson qubit
• Qubit metrology of ultralow phase noise using randomized benchmarking
• Entanglement and Quantum Error Correction with Superconducting Qubits

Cited by in corpus (65)

• A Quantum Engineer's Guide to Superconducting Qubits
• Superconducting Qubits: Current State of Play
• Quantum information processing with superconducting circuits: a review
• Superconducting Gatemon Qubit based on a Proximitized Two-Dimensional Electron Gas
• Quantum coherent control of a hybrid superconducting circuit made with graphene-based van der Waals heterostructures
• Metallic supercurrent field-effect transistor
• Transparent Semiconductor-Superconductor Interface and Induced Gap in an Epitaxial Heterostructure Josephson Junction
• Benchmarking Gate Fidelities in a Si/SiGe Two-Qubit Device
• Evolution of Nanowire Transmons and Their Quantum Coherence in Magnetic Field
• Time-domain characterization and correction of on-chip distortion of control pulses in a quantum processor
• Simulating Quantum Materials with Digital Quantum Computers
• A perspective on semiconductor-based superconducting qubits
• Integrated tool-set for Control, Calibration and Characterization of quantum devices applied to superconducting qubits
• Anharmonicity of a Gatemon Qubit with a Few-Mode Josephson Junction
• Weyl nodes in Andreev spectra of multiterminal Josephson junctions: Chern numbers, conductances and supercurrents
• Ultra-efficient superconducting Dayem bridge field-effect transistor
• Josephson Field-Effect Transistors Based on All-Metallic Al/Cu/Al Proximity Nanojunctions
• Voltage-Controlled Superconducting Quantum Bus
• Floquet quantum simulation with superconducting qubits
• Bounding the average gate fidelity of composite channels using the unitarity
• Ballistic one-dimensional holes with strong g-factor anisotropy in germanium
• Destructive Little-Parks Effect in a Full-Shell Nanowire-based Transmon
• Gate-Tunable Transmon Using Selective-Area-Grown Superconductor-Semiconductor Hybrid Structures on Silicon
• Joint Quantum-State and Measurement Tomography with Incomplete Measurements
• From randomized benchmarking experiments to gateset circuit fidelity: how to interpret randomized benchmarking decay parameters
• Superconducting resonators with voltage-controlled frequency and nonlinearity
• Realization of a Carbon-Nanotube-Based Superconducting Qubit
• Detecting induced $p\pm ip$ pairing at the Al-InAs interface with a quantum microwave circuit
• Epitaxial Superconductor-Semiconductor Two-Dimensional Systems for Superconducting Quantum Circuits
• Simulated Quantum Annealing with Two All-to-All Connectivity Schemes
• Radio-frequency methods for Majorana-based quantum devices: fast charge sensing and phase diagram mapping
• Majorana oscillations and parity crossings in semiconductor-nanowire-based transmon qubits
• Anomalous Josephson current through a driven double quantum dot
• Superconducting islands with semiconductor-nanowire-based topological Josephson junctions
• Gatemon qubit based on a thin InAs-Al hybrid nanowire
• Quantum dynamics of the small-polaron formation in a superconducting analog simulator
• Controlled-Z gate for transmon qubits coupled by semiconductor junctions
• Electro-optomechanical equivalent circuits for quantum transduction
• Direct measurement of a $\sin (2\phi )$ current phase relation in a graphene superconducting quantum interference device
• Quasiparticle dynamics in epitaxial Al-InAs planar Josephson junctions
• Evolution of $4\pi$-periodic Supercurrent in the Presence of In-plane Magnetic Field
• Capacitively-coupled and inductively-coupled excitons in bilayer MoS${}_2$
• From nonreciprocal to charge-4e supercurrents in Ge-based Josephson devices with tunable harmonic content
• Nonadiabatic corrections to fast dispersive multiqubit gates involving Z control
• Dynamic spin-triplet order induced by alternating electric fields in superconductor-ferromagnet-superconductor Josephson junctions
• Visibility of noisy quantum dot-based measurements of Majorana qubits
• Hole weak anti-localization in a strained-Ge surface quantum well
• The carbon nanotube gatemon qubit
• Hard-gap spectroscopy in a self-defined mesoscopic InAs/Al nanowire Josephson junction
• Gate-Compatible Circuit Quantum Electrodynamics in a Three-Dimensional Cavity Architecture
• Hybridization mechanism of the dual proximity effect in superconductor-topological insulator interfaces
• Supercurrent-induced long-range triplet correlations and controllable Josephson effect in superconductor/ferromagnet hybrids with extrinsic SOC
• Implementation of single-qubit gates via parametric modulation in the Majorana transmon
• The superconducting circuit companion -- an introduction with worked examples
• Cryogenic Behavior of High-Permittivity Gate Dielectrics: The Impact of the Atomic Layer Deposition Temperature and the Lithographic Patterning Method
• Josephson Field Effect Transistors with InAs on Insulator and High Permittivity Gate Dielectrics
• Microwave Andreev bound state spectroscopy in a semiconductor-based Planar Josephson junction
• Gatemon Qubit Revisited for Improved Reliability and Stability
• Parity-protected superconducting qubit based on topological insulators
• Active electron cooling of graphene
• Partial randomized benchmarking
• Strongly anharmonic flux-tunable transmon based on InAs-Al 2D heterostructure
• Qubit based on spin-singlet Yu-Shiba-Rusinov states
• Electrical Properties of Selective-Area-Grown Superconductor-Semiconductor Hybrid Structures on Silicon
• Supercurrent tuning of the Josephson coupling energy