On-demand single-electron transfer between distant quantum dots

Abstract

Single-electron circuits of the future, consisting of a network of quantum dots, will require a mechanism to transport electrons from one functional part to another. For example, in a quantum computer[1] decoherence and circuit complexity can be reduced by separating qubit manipulation from measurement and by providing some means to transport electrons from one to the other.[2] Tunnelling between neighbouring dots has been demonstrated[3, 4] with great control, and the manipulation of electrons in single and double-dot systems is advancing rapidly.[5-8] For distances greater than a few hundred nanometres neither free propagation nor tunnelling are viable whilst maintaining confinement of single electrons. Here we show how a single electron may be captured in a surface acoustic wave minimum and transferred from one quantum dot to a second unoccupied dot along a long empty channel. The transfer direction may be reversed and the same electron moved back and forth over sixty times without error, a cumulative distance of 0.25 mm. Such on-chip transfer extends communication between quantum dots to a range that may allow the integration of discrete quantum information-processing components and devices.

4 pages, 4 figures

References in corpus (4)

• Single-shot read-out of an individual electron spin in a quantum dot
• Electrically driven single electron spin resonance in a slanting Zeeman field
• Single-shot readout of electron spin states in a quantum dot using spin-dependent tunnel rates
• Relaxation of hot electrons in a degenerate two-dimensional electron system: transition to one-dimensional scattering

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• Circuit Quantum Electrodynamics with a Spin Qubit
• A Coherent Spin-Photon Interface in Silicon
• Single-electron current sources: towards a refined definition of ampere
• Coherence and Indistinguishability of Single Electrons Emitted by Independent Sources
• Phonon-mediated quantum state transfer and remote qubit entanglement
• Coherent control of single electrons: a review of current progress
• Quantum Communication Using Semiconductor Quantum Dots
• Electron quantum optics in ballistic chiral conductors
• Long-range coherent coupling in a quantum dot array
• Coupling a Surface Acoustic Wave to an Electron Spin in diamond via a Dark State
• Non-adiabatic quantized charge pumping with tunable-barrier quantum dots: a review of current progress
• Electrical control of a solid-state flying qubit
• Integer and fractional charge Lorentzian voltage pulses analyzed in the frame of Photon-assisted Shot Noise
• Coherent shuttle of electron-spin states
• Numerical simulations of time resolved quantum electronics
• Single-Spin CCD
• Current noise spectrum of a single particle emitter: theory and experiment
• Photon mediated interaction between distant quantum dot circuits
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• Fast spin information transfer between distant quantum dots using individual electrons
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• Interactions and charge fractionalization in an electronic Hong-Ou-Mandel interferometer
• Fourier synthesis of radio frequency nanomechanical pulses with different shapes
• Coherent long-distance displacement of individual electron spins
• Minimal excitations in the fractional quantum Hall regime
• Microwave photon-mediated interactions between semiconductor qubits
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• Blueprint of a scalable spin qubit shuttle device for coherent mid-range qubit transfer in disordered Si/SiGe/SiO${}_2$
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• Coherent microwave photon mediated coupling between a semiconductor and a superconductor qubit
• Remote entanglement via adiabatic passage using a tunably-dissipative quantum communication system
• Molecular quantum spin network controlled by a single qubit
• Surface acoustic wave unidirectional transducers for quantum applications
• A few-electron quadruple quantum dot in a closed loop
• Interaction of surface acoustic waves with electronic excitations in graphene
• Spin Relaxation due to Charge Noise
• Shuttling an electron spin through a silicon quantum dot array
• Quantum erasure using entangled surface acoustic phonons
• Si/SiGe QuBus for single electron information-processing devices with memory and micron-scale connectivity function
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• Spin Qubit Relaxation in a Moving Quantum Dot
• Spin Orbit Mediated Manipulation of Heavy Hole Spin Qubit in Gated Semiconductor Nanodevices
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• Waiting time distribution for trains of quantized electron pulses
• Negative resistance state in superconducting NbSe${}_2$ induced by surface acoustic waves
• High-acoustic-index-contrast phononic circuits: numerical modeling
• Interplay of charge noise and coupling to phonons in adiabatic electron transfer between quantum dots
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• Graphene Enabled Low-Control Quantum Gates between Static and Mobile Spins
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• Adiabatic electron charge transfer between two quantum dots in presence of 1/f noise
• High-fidelity single-spin shuttling in silicon
• Visualization of Surface-acoustic-wave Potential by Transmission-mode Microwave Impedance Microscopy
• Probing the energy reactance with adiabatically driven quantum dots
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• On-chip unidirectional waveguiding for surface acoustic waves along a defect line in a triangular lattice
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• Dissipative Long-Range Entanglement Generation between Electronic Spins
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