Charge detection in an array of CMOS quantum dots

Abstract

The recent development of arrays of quantum dots in semiconductor nanostructures highlights the progress of quantum devices toward large scale. However, how to realize such arrays on a scalable platform such as silicon is still an open question. One of the main challenge resides in the detection of charges within the array. It is a prerequisite functionality to initialize a desired charge state and readout spins through spin-to-charge conversion mechanisms. In this paper, we use two methods based on either a single-lead charge detector, or a reprogrammable single electron transistor. Thanks to these methods, we study the charge dynamics and sensitivity by performing single shot detection of the charge. Finally, we can probe the charge stability at any node of a linear array and assess the Coulomb disorder in the structure. We find an electrochemical potential fluctuation induced by charge noise comparable to that reported in other silicon quantum dots.

10 pages, 6 figures

References in corpus (27)

• Single-shot read-out of an individual electron spin in a quantum dot
• A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
• A programmable two-qubit quantum processor in silicon
• 1/f noise: implications for solid-state quantum information
• Quantum CNOT Gate for Spins in Silicon
• Silicon CMOS architecture for a spin-based quantum computer
• Fidelity benchmarks for two-qubit gates in silicon
• Single-shot readout of electron spin states in a quantum dot using spin-dependent tunnel rates
• Rapid Single-Shot Measurement of a Singlet-Triplet Qubit
• Scalable gate architecture for densely packed semiconductor spin qubits
• Shuttling a single charge across a one-dimensional array of silicon quantum dots
• A Crossbar Network for Silicon Quantum Dot Qubits
• Dispersive Readout of a Few-Electron Double Quantum Dot with Fast rf Gate-Sensors
• Rapid high-fidelity gate-based spin read-out in silicon
• Gate-based single-shot readout of spins in silicon
• Low-frequency charge noise in Si/SiGe quantum dots
• Quantum Dot Arrays in Silicon and Germanium
• Coherent shuttle of electron-spin states
• Nagaoka ferromagnetism observed in a quantum dot plaquette
• Electrically Protected Valley-Orbit Qubits in Silicon
• Mesoscopic admittance of a double quantum dot
• Fast gate-based readout of silicon quantum dots using Josephson parametric amplification
• A 2x2 quantum dot array with controllable inter-dot tunnel couplings
• A logical qubit in a linear array of semiconductor quantum dots
• Radio frequency charge sensing in InAs nanowire double quantum dots
• Reconfigurable quadruple quantum dots in a silicon nanowire transistor
• A low-disorder Metal-Oxide-Silicon double quantum dot

Cited by in corpus (28)

• Qubits made by advanced semiconductor manufacturing
• Scaling silicon-based quantum computing using CMOS technology: State-of-the-art, Challenges and Perspectives
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• Charge-noise spectroscopy of Si/SiGe quantum dots via dynamically-decoupled exchange oscillations
• Probing quantum devices with radio-frequency reflectometry
• A single hole spin with enhanced coherence in natural silicon
• Single-electron control in a foundry-fabricated two-dimensional qubit array
• A flexible design platform for Si/SiGe exchange-only qubits with low disorder
• Blueprint of a scalable spin qubit shuttle device for coherent mid-range qubit transfer in disordered Si/SiGe/SiO${}_2$
• Fast and high-fidelity state preparation and measurement in triple-quantum-dot spin qubits
• Universal control of four singlet-triplet qubits
• A two-dimensional array of single-hole quantum dots
• Single-electron operation of a silicon-CMOS 2x2 quantum dot array with integrated charge sensing
• Toward Robust Autotuning of Noisy Quantum Dot Devices
• Tunable hole spin-photon interaction based on g-matrix modulation
• Spin digitizer for high-fidelity readout of a cavity-coupled silicon triple quantum dot
• Interplay of charge noise and coupling to phonons in adiabatic electron transfer between quantum dots
• Exciton transport in a germanium quantum dot ladder
• CMOS Quantum Computing: Toward A Quantum Computer System-on-Chip
• Single-shot readout of multiple donor electron spins with a gate-based sensor
• Scalable on-chip multiplexing of silicon single and double quantum dots
• Radio-frequency C-V measurements with sub-attofarad sensitivity
• Estimation of Convex Polytopes for Automatic Discovery of Charge State Transitions in Quantum Dot Arrays
• Charge-sensing of a Ge/Si core/shell nanowire double quantum dot using a high-impedance superconducting resonator
• Gate reflectometry in dense quantum dot arrays
• Leveraging Off-the-Shelf Silicon Chips for Quantum Computing
• Micromagnet-free operation of electron spin qubits in Si/Si${}_{1-x}$Ge${}_x$ vertical double quantum dots
• State Initialization of a Hot Spin Qubit in a Double Quantum Dot by Measurement-Based Quantum Feedback Control