Shuttling a single charge across a one-dimensional array of silicon quantum dots

Abstract

Significant advances have been made towards fault-tolerant operation of silicon spin qubits, with single qubit fidelities exceeding 99.9%, several demonstrations of two-qubit gates based on exchange coupling, and the achievement of coherent single spin-photon coupling. Coupling arbitrary pairs of spatially separated qubits in a quantum register poses a significant challenge as most qubit systems are constrained to two dimensions (2D) with nearest neighbor connectivity. For spins in silicon, new methods for quantum state transfer should be developed to achieve connectivity beyond nearest-neighbor exchange. Here we demonstrate shuttling of a single electron across a linear array of 9 series-coupled Si quantum dots in ~50 ns via a series of pairwise interdot charge transfers. By progressively constructing more complex pulse sequences we perform parallel shuttling of 2 and 3 electrons at a time through the 9-dot array. These experiments establish that physical transport of single electrons is feasible in large silicon quantum dot arrays.

References in corpus (38)

• Hardware-efficient Variational Quantum Eigensolver for Small Molecules and Quantum Magnets
• Electron transport through double quantum dots
• An addressable quantum dot qubit with fault-tolerant control fidelity
• A Two Qubit Logic Gate in Silicon
• A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
• A programmable two-qubit quantum processor in silicon
• Electron spin coherence exceeding seconds in high purity silicon
• High-fidelity preparation, gates, memory and readout of a trapped-ion quantum bit
• Interfacing spin qubits in quantum dots and donors - hot, dense and coherent
• Quantum CNOT Gate for Spins in Silicon
• Experimental Comparison of Two Quantum Computing Architectures
• Circuit Quantum Electrodynamics with a Spin Qubit
• A blueprint for demonstrating quantum supremacy with superconducting qubits
• A Coherent Spin-Photon Interface in Silicon
• Silicon CMOS architecture for a spin-based quantum computer
• Strong spin-photon coupling in silicon
• Quantum simulation of a Fermi-Hubbard model using a semiconductor quantum dot array
• Spin-valley lifetimes in a silicon quantum dot with tunable valley splitting
• Scalable gate architecture for densely packed semiconductor spin qubits
• Coherent electronic transfer in quantum dot systems using adiabatic passage
• Spin dynamics in InAs-nanowire quantum-dots coupled to a transmission line
• Strong coupling of a spin qubit to a superconducting stripline cavity
• Characterizing errors on qubit operations via iterative randomized benchmarking
• Ultra-long distance interaction between spin qubits
• Benchmarking Gate Fidelities in a Si/SiGe Two-Qubit Device
• Coherent shuttle of electron-spin states
• Single-Spin CCD
• Fast spin information transfer between distant quantum dots using individual electrons
• A two-atom electron pump
• Efficient multiqubit entanglement via a spin-bus
• Coherent long-distance displacement of individual electron spins
• A self-referenced single-electron quantized-current source
• An accurate single-electron pump based on a highly tunable silicon quantum dot
• Hyperfine-phonon spin relaxation in a single-electron GaAs quantum dot
• Simultaneous Spin-Charge Relaxation in Double Quantum Dots
• Full control of quadruple quantum dot circuit charge states in the single electron regime
• High-fidelity and robust two-qubit gates for quantum-dot spin qubits in silicon
• Coherent control of individual electron spins in a two dimensional array of quantum dots

Cited by in corpus (169)

• Semiconductor Spin Qubits
• Semiconductor Qubits In Practice
• Two-qubit silicon quantum processor with operation fidelity exceeding 99%
• Scaling silicon-based quantum computing using CMOS technology: State-of-the-art, Challenges and Perspectives
• Long-Range Microwave Mediated Interactions Between Electron Spins
• Semiconductor Quantum Computation
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• Quantum-Coherent Nanoscience
• Quantum Dot Arrays in Silicon and Germanium
• Probing single electrons across 300 mm spin qubit wafers
• Universal logic with encoded spin qubits in silicon
• Noisy intermediate-scale quantum computers
• Loading a quantum-dot based "Qubyte" register
• Probing quantum devices with radio-frequency reflectometry
• Coherent spin qubit transport in silicon
• Low-overhead fault-tolerant quantum computing using long-range connectivity
• Conveyor-mode single-electron shuttling in Si/SiGe for a scalable quantum computing architecture
• Coherent spin state transfer via Heisenberg exchange
• Coherent transfer of quantum information in silicon using resonant SWAP gates
• A shuttling-based two-qubit logic gate for linking distant silicon quantum processors
• Single-electron control in a foundry-fabricated two-dimensional qubit array
• Large, tunable valley splitting and single-spin relaxation mechanisms in a Si/Si${}_x$Ge${}_{1-x}$ quantum dot
• Optimized cavity-mediated dispersive two-qubit gates between spin qubits
• Blueprint of a scalable spin qubit shuttle device for coherent mid-range qubit transfer in disordered Si/SiGe/SiO${}_2$
• Single-electron double quantum dots in bilayer graphene
• The SpinBus Architecture: Scaling Spin Qubits with Electron Shuttling
• Multicore Quantum Computing
• Adiabatic quantum state transfer in a semiconductor quantum-dot spin chain
• Site-selective quantum control in an isotopically enriched 28Si/SiGe quadruple quantum dot
• Colloquium: Advances in automation of quantum dot devices control
• Electric-field control and noise protection of the flopping-mode spin qubit
• Shuttling an electron spin through a silicon quantum dot array
• Charge detection in an array of CMOS quantum dots
• Computer-automated tuning procedures for semiconductor quantum dot arrays
• 12-spin-qubit arrays fabricated on a 300 mm semiconductor manufacturing line
• Spin shuttling in a silicon double quantum dot
• Optimizing quantum gates towards the scale of logical qubits
• How to wire a 1000-qubit trapped ion quantum computer
• Si/SiGe QuBus for single electron information-processing devices with memory and micron-scale connectivity function
• Crosstalk analysis for single-qubit and two-qubit gates in spin qubit arrays
• Coherent spin qubit shuttling through germanium quantum dots
• Fully tunable longitudinal spin-photon interactions in Si and Ge quantum dots
• Spin-EPR-pair separation by conveyor-mode single electron shuttling in Si/SiGe
• Flopping-mode electric dipole spin resonance
• Autonomous tuning and charge state detection of gate defined quantum dots
• Generic transport formula for a system driven by Markovian reservoirs
• Single-photon Emission from an Acoustically-driven Lateral Light-emitting Diode
• Efficient orthogonal control of tunnel couplings in a quantum dot array
• A Machine Learning Approach for Automated Fine-Tuning of Semiconductor Spin Qubits
• Gate-Controlled Quantum Dots Based on Two-Dimensional Materials
• Protocol for a resonantly-driven three-qubit Toffoli gate with silicon spin qubits
• Tunable coupling and isolation of single electrons in silicon metal-oxide-semiconductor quantum dots
• How valley-orbit states in silicon quantum dots probe quantum well interfaces
• Parametric longitudinal coupling between a high-impedance superconducting resonator and a semiconductor quantum dot singlet-triplet spin qubit
• Long-Distance Superexchange between Semiconductor Quantum-Dot Electron Spins
• Is all-electrical silicon quantum computing feasible in the long term?
• Algorithm for automated tuning of a quantum dot into the single-electron regime
• Analog Quantum Simulation of the Dynamics of Open Quantum Systems with Quantum Dots and Microelectronic Circuits
• Enhanced spin coherence while displacing electron in a 2D array of quantum dots
• Coherent multi-spin exchange coupling in a quantum-dot spin chain
• Electrical control of uniformity in quantum dot devices
• Simulated coherent electron shuttling in silicon quantum dots
• Non-Hermitian many-body topological excitations in interacting quantum dots
• Signatures of discrete time-crystallinity in transport through an open Fermionic chain
• Quantum device fine-tuning using unsupervised embedding learning
• Interplay of charge noise and coupling to phonons in adiabatic electron transfer between quantum dots
• Effects of Interface Steps on the Valley Orbit coupling in a Si/SiGe quantum dot
• Braiding-based quantum control of a Majorana qubit built from quantum dots
• Adiabatic electron charge transfer between two quantum dots in presence of 1/f noise
• Conditional Teleportation of Quantum-Dot Spin States
• Scalable, high-fidelity all-electronic control of trapped-ion qubits
• Enhanced quantum state transfer: Circumventing quantum chaotic behavior
• High-fidelity single-spin shuttling in silicon
• Photon statistics of a double quantum dot micromaser: Quantum treatment
• Probing the Spatial Variation of the Inter-Valley Tunnel Coupling in a Silicon Triple Quantum Dot
• Looped Pipelines Enabling Effective 3D Qubit Lattices in a Strictly 2D Device
• Switching between relaxation hotspots and coldspots in disordered spin qubits
• Strategies for enhancing spin-shuttling fidelities in Si/SiGe quantum wells with random-alloy disorder
• Majorana zero modes in Y-shape interacting Kitaev wires
• Tuning arrays with rays: Physics-informed tuning of quantum dot charge states
• Spin entangled state transfer in quantum dot arrays: Coherent adiabatic and speed-up protocols
• Ferromagnetism in Quantum Dot Plaquettes
• Coherent transport of spin by adiabatic passage in quantum dot arrays
• High-fidelity spin qubit shuttling via large spin-orbit interaction
• Emergence and Dynamical Stability of Charge Time-Crystal in a Current-Carrying Quantum Dot Simulator
• CMOS Quantum Computing: Toward A Quantum Computer System-on-Chip
• Roadmap on Atomic-scale Semiconductor Devices
• Paired electron motion in interacting chains of quantum dots
• Split-Gate Cavity Coupler for Silicon Circuit Quantum Electrodynamics
• Electron cascade for spin readout
• Parallel entangling gate operations and two-way quantum communication in spin chains
• Thermodynamic Uncertainty Relations for Coherent Transport
• Automated extraction of capacitive coupling for quantum dot systems
• Two dimensional vertex-decorated Lieb lattice with exact mobility edges and robust flat bands
• Autonomous estimation of high-dimensional Coulomb diamonds from sparse measurements
• An automated approach for consecutive tuning of quantum dot arrays
• Cryogen-free scanning gate microscope for the characterization of Si/Si${}_{0.7}$Ge${}_{0.3}$ quantum devices at milli-Kelvin temperatures
• Crosstalk analysis for simultaneously driven two-qubit gates in spin qubit arrays
• Robust energy selective tunneling readout of singlet triplet qubits under large magnetic field gradient
• Spin-Valley Qubit Dynamics In Exchange Coupled Silicon Quantum Dots
• Single-shot readout of multiple donor electron spins with a gate-based sensor
• Compromise-Free Scaling of Qubit Speed and Coherence
• Interplay of exchange and superexchange in triple quantum dots
• Discrete time crystal in the gradient field Heisenberg model
• Single-electron occupation in quantum dot arrays at selectable plunger gate voltage
• Machine learning optimization of Majorana hybrid nanowires
• Bridging the reality gap in quantum devices with physics-aware machine learning
• Robust photon-mediated entangling gates between quantum dot spin qubits
• Valley-Free Silicon Fins Caused by Shear Strain
• Measurement of tunnel coupling in a Si double quantum dot based on charge sensing
• Charge sensing the parity of an Andreev molecule
• Coupling of hole double quantum dot in planar germanium to a microwave cavity
• A random-walk benchmark for single-electron circuits
• Microwave-resonator-detected excited-state spectroscopy of a double quantum dot
• Extended Hubbard model describing small multi-dot arrays in bilayer graphene
• Flopping-mode electron dipole spin resonance in the strong-driving regime
• Qubit-controlled directional edge states in waveguide QED
• Democratizing Spin Qubits
• Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction
• Partial Landau-Zener transitions and applications to qubit shuttling
• Topologically protected subradiant cavity polaritons through linewidth narrowing enabled by dissipationless edge states
• Low-Dissipation Data Bus via Coherent Quantum Dynamics
• Decoherence of electron spin qubit during transfer between two semiconductor quantum dots at low magnetic fields
• Theory of multi-dimensional quantum capacitance and its application to spin and charge discrimination in quantum-dot arrays
• Gate reflectometry in dense quantum dot arrays
• Developing high-impedance superconducting resonators and on-chip filters for semiconductor quantum dot circuit quantum electrodynamics
• Parity-dependent state transfer for direct entanglement generation
• Long-range two-hybrid-qubit gates mediated by a microwave cavity with red sidebands
• An elongated quantum dot as a distributed charge sensor
• Controlled quantum dot array segmentation via a highly tunable interdot tunnel coupling
• Topological Spin Textures Enabling Quantum Transmission
• Certain exact many-body results for Hubbard model ground states testable in small quantum dot arrays
• Collective ground states in small lattices of coupled quantum dots
• Noise Classification in Three-Level Quantum Networks by Machine Learning
• Scalable Parity Architecture With a Shuttling-Based Spin Qubit Processor
• Compiling the surface code to crossbar spin qubit architectures
• Nonadiabatic quantum control of quantum dot arrays with fixed exchange using Cartan decomposition
• Kondo enhancement of current induced spin accumulation in a quantum dot
• Two-qubit sweet spots for capacitively coupled exchange-only spin qubits
• Universal control of superexchange in linear triple quantum dots with an empty mediator
• Protecting coherence from the environment via Stark many-body localization in a Quantum-Dot Simulator
• Sign-switching of superexchange mediated by few electrons under non-uniform magnetic field
• Few-electrode design for silicon MOS quantum dots
• Single electron routing in a silicon quantum-dot array
• Resonator-mediated quantum gate between distant charge qubits
• Single-shot latched readout of a quantum dot qubit using barrier gate pulsing
• Suppressing Si Valley Excitation and Valley-Induced Spin Dephasing for Long-Distance Shuttling
• Interplay of Zeeman Splitting and Tunnel Coupling in Coherent Spin Qubit Shuttling
• Superradiant-like dynamics by electron shuttling on a nuclear-spin island
• A SWAP Gate for Spin Qubits in Silicon
• Electrical Interconnects for Silicon Spin Qubits
• Current-based metrology with two-terminal mesoscopic conductors
• Omnidirectional shuttling to avoid valley excitations in Si/SiGe quantum wells
• Compilation Techniques for Spin Qubits in a Shuttling Bus Architecture
• Long-range spin transport in asymmetric quadruple quantum dots configurations
• Decoherence and fidelity enhancement during shuttling of entangled spin qubits
• Towards Utilizing Scanning Gate Microscopy as a High-Resolution Probe of Valley Splitting in Si/SiGe Heterostructures
• AI-enhanced tuning of quantum dot Hamiltonians toward Majorana modes
• Entangling nuclear spins in distant quantum dots via an electron bus
• Density dependence of the excitation gaps in an undoped Si/SiGe double-quantum-well heterostructure
• Designs for a two-dimensional Si quantum dot array with spin qubit addressability
• Spin-Dependent Transport Through a Colloidal Quantum Dot: The Role of Exchange Interactions
• Digital-Controlled Method of Conveyor-Belt Spin Shuttling in Silicon for Large-Scale Quantum Computation
• Learning Coulomb Diamonds in Large Quantum Dot Arrays
• Sweet-spot protection of hole spins in sparse arrays via spin-dependent magnetotunneling
• Switchable spin-photon coupling with hole spins in single-quantum dots
• Optimization of conveyance of quantum particles by moving potential well
• Study of Microwave Assisted CNOT Gate
• Exploring Entanglement Spectrum and Phase Diagram in multi-electron Quantum Dot Chains