Quantum coherent control of a hybrid superconducting circuit made with graphene-based van der Waals heterostructures

Abstract

Quantum coherence and control is foundational to the science and engineering of quantum systems. In van der Waals (vdW) materials, the collective coherent behavior of carriers has been probed successfully by transport measurements. However, temporal coherence and control, as exemplified by manipulating a single quantum degree of freedom, remains to be verified. Here we demonstrate such coherence and control of a superconducting circuit incorporating graphene-based Josephson junctions. Furthermore, we show that this device can be operated as a voltage-tunable transmon qubit, whose spectrum reflects the electronic properties of massless Dirac fermions traveling ballistically. In addition to the potential for advancing extensible quantum computing technology, our results represent a new approach to studying vdW materials using microwave photons in coherent quantum circuits.

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• Quantum-Coherent Nanoscience
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• Nanomaterials for Quantum Information Science and Engineering
• Relating Andreev Bound States and Supercurrents in Hybrid Josephson Junctions
• Highly Tunable Junctions and Nonlocal Josephson Effect in Magic Angle Graphene Tunneling Devices
• Hexagonal Boron Nitride (hBN) as a Low-loss Dielectric for Superconducting Quantum Circuits and Qubits
• A perspective on semiconductor-based superconducting qubits
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• Electrical switching of a moiré ferroelectric superconductor
• Suppressed Charge Dispersion via Resonant Tunneling in a Single-Channel Transmon
• Observation of vanishing charge dispersion of a nearly-open superconducting island
• A gate-tunable, field-compatible fluxonium
• A Tunable Monolithic SQUID in Twisted Bilayer Graphene
• A gate-tunable graphene Josephson parametric amplifier
• Quantum noise limited microwave amplification using a graphene Josephson junction
• Anomalous stopping and charge transfer in proton-irradiated graphene
• Gate-Tunable Transmon Using Selective-Area-Grown Superconductor-Semiconductor Hybrid Structures on Silicon
• Multi-level Quantum Noise Spectroscopy
• Miniaturizing transmon qubits using van der Waals materials
• A gate tunable transmon qubit in planar Ge
• Tuning supercurrent in Josephson field effect transistors using h-BN dielectric
• Realization of a Carbon-Nanotube-Based Superconducting Qubit
• Phase-dependent microwave response of a graphene Josephson junction
• Gate-tunable kinetic inductance parametric amplifier
• Differentiating Majorana from Andreev Bound States in a Superconducting Circuit
• Majorana oscillations and parity crossings in semiconductor-nanowire-based transmon qubits
• Measurements of Phase Dynamics in Planar Josephson Junctions and SQUIDs
• Spectral response of Josephson junctions with low-energy quasiparticles
• Superconducting islands with semiconductor-nanowire-based topological Josephson junctions
• Coplanar cavity for strong coupling between photons and magnons in van der Waals antiferromagnet
• Controlled DC Monitoring of a Superconducting Qubit
• Probing hundreds of individual quantum defects in polycrystalline and amorphous alumina
• Flip-chip-based microwave spectroscopy of Andreev bound states in a planar Josephson junction
• 1/f critical current noise in short ballistic graphene Josephson junctions
• Gate control of superconducting current: Mechanisms, parameters and technological potential
• Rabi oscillations in a superconducting nanowire circuit
• Andreev reflection in ballistic normal metal/graphene/superconductor junctions
• Charge qubit in van der Waals heterostructures
• Recent Advances in Unconventional Ferroelectrics and Multiferroics
• Direct measurement of a $\sin (2\phi )$ current phase relation in a graphene superconducting quantum interference device
• Gatemon qubit on a germanium quantum-well heterostructure
• A flux tunable superconducting quantum circuit based on Weyl semimetal MoTe2
• From nonreciprocal to charge-4e supercurrents in Ge-based Josephson devices with tunable harmonic content
• Superconducting Contact and Quantum Interference Between Two-Dimensional van der Waals and Three-Dimensional Conventional Superconductors
• Microwave Sensing of Andreev Bound States in a Gate-Defined Superconducting Quantum Point Contact
• Nanoscale spin ordering and spin screening effects in tunnel ferromagnetic Josephson junctions
• Gatemonium: A Voltage-Tunable Fluxonium
• Investigating microwave loss of SiGe using superconducting transmon qubits
• Anomalous Phase Dynamics of Driven Graphene Josephson Junctions
• Plasmonic photonic crystal mirror for long-lived interlayer exciton generation
• The carbon nanotube gatemon qubit
• Effect of dilute impurities on short graphene Josephson junctions
• Charge carrier density noise in graphene: effect of localized/delocalized traps
• Low-temperature environments for quantum computation and quantum simulation
• 1/f noise in quantum nanoscience
• Gate-Compatible Circuit Quantum Electrodynamics in a Three-Dimensional Cavity Architecture
• Microwave-induced conductance replicas in hybrid Josephson junctions without Floquet-Andreev states
• Subgap states in semiconductor-superconductor devices for quantum technologies: Andreev qubits and minimal Majorana chains
• The study of contact properties in edge-contacted graphene-aluminum Josephson junctions
• Second spectrum of charge carrier density fluctuations in graphene due to trapping/detrapping processes
• Material matters in superconducting qubits
• Hot Carrier Thermalization and Josephson Inductance Thermometry in a Graphene-based Microwave Circuit
• Superconducting-semiconducting voltage-tunable qubits in the third dimension
• Josephson junctions based on ultraclean carbon nanotubes
• Low-frequency critical current noise in graphene Josephson junctions in the open-circuit gate voltage limit
• Full tomography of topological Andreev bands in graphene Josephson junctions
• Gatemon Qubit Revisited for Improved Reliability and Stability
• Fabrication and Characterization of Magnetic-Field-Resilient MoRe Superconducting Coplanar Waveguide Resonators
• Integration of graphene-based superconducting quantum circuits in 3D cavity
• Streaking single-electron ionization in open-shell molecules driven by X-ray pulses
• Mapping the direction of electron ionization to phase delay between VUV and IR laser pulses
• Active electron cooling of graphene
• Exploring van der Waals cuprate superconductors using a hybrid microwave circuit
• Superconducting Cavity-Based Sensing of Band Gaps in 2D Materials
• Integration of topological insulator Josephson junctions in superconducting qubit circuits
• Graphene amplifier reaches the quantum-noise limit
• Josephson penetration depth in coplanar junctions based on 2D materials
• Local analysis of a single impurity on a graphene Josephson Junction
• Making high-quality quantum microwave devices with van der Waals superconductors
• Electrical Properties of Selective-Area-Grown Superconductor-Semiconductor Hybrid Structures on Silicon
• Supercurrent tuning of the Josephson coupling energy
• Anisotropic supercurrent suppression and revivals in a graphene-based Josephson junction under in-plane magnetic fields
• Quantum Computation