A programmable two-qubit quantum processor in silicon

Abstract

With qubit measurement and control fidelities above the threshold of fault-tolerance, much attention is moving towards the daunting task of scaling up the number of physical qubits to the large numbers needed for fault tolerant quantum computing. Here, quantum dot based spin qubits may offer significant advantages due to their potential for high densities, all-electrical operation, and integration onto an industrial platform. In this system, the initialisation, readout, single- and two-qubit gates have been demonstrated in various qubit representations. However, as seen with other small scale quantum computer demonstrations, combining these elements leads to new challenges involving qubit crosstalk, state leakage, calibration, and control hardware which provide invaluable insight towards scaling up. Here we address these challenges and demonstrate a programmable two-qubit quantum processor in silicon by performing both the Deutsch-Josza and the Grover search algorithms. In addition, we characterise the entanglement in our processor through quantum state tomography of Bell states measuring state fidelities between 85-89% and concurrences between 73-80%. These results pave the way for larger scale quantum computers using spins confined to quantum dots.

References in corpus (34)

• Quantum Computation with Quantum Dots
• Quantum Mechanics helps in searching for a needle in a haystack
• Surface codes: Towards practical large-scale quantum computation
• On the Measurement of Qubits
• Experimental realization of Shor's quantum factoring algorithm using nuclear magnetic resonance
• Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
• Single-shot read-out of an individual electron spin in a quantum dot
• Silicon Quantum Electronics
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Randomized Benchmarking of Quantum Gates
• 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
• Demonstration of a small programmable quantum computer with atomic qubits
• Electron spin coherence exceeding seconds in high purity silicon
• Storing quantum information for 30 seconds in a nanoelectronic device
• Decoherence in a superconducting quantum bit circuit
• Interfacing spin qubits in quantum dots and donors - hot, dense and coherent
• A CMOS silicon spin qubit
• Electrically driven single electron spin resonance in a slanting Zeeman field
• Quantum CNOT Gate for Spins in Silicon
• Demonstration of Entanglement of Electrostatically Coupled Singlet-Triplet Qubits
• Electrical control of a long-lived spin qubit in a Si/SiGe quantum dot
• Decoherence-protected quantum gates for a hybrid solid-state spin register
• Electrometry Using Coherent Exchange Oscillations in a Singlet-Triplet-Qubit
• Spin-valley lifetimes in a silicon quantum dot with tunable valley splitting
• Reduced sensitivity to charge noise in semiconductor spin qubits via symmetric operation
• Quantum control and process tomography of a semiconductor quantum dot hybrid qubit
• Noise suppression using symmetric exchange gates in spin qubits
• Self-Consistent Measurement and State Tomography of an Exchange-Only Spin Qubit
• Gate fidelity and coherence of an electron spin in a Si/SiGe quantum dot with micromagnet
• Efficient C-Phase gate for single-spin qubits in quantum dots
• Hubbard model description of silicon spin qubits: charge stability diagram and tunnel coupling in Si double quantum dots
• Simultaneous Spin-Charge Relaxation in Double Quantum Dots

Cited by in corpus (389)

• Semiconductor Spin Qubits
• The European Quantum Technologies Roadmap
• Quantum CNOT Gate for Spins in Silicon
• Demonstration of multi-qubit entanglement and algorithms on a programmable neutral atom quantum computer
• Computing with spin qubits at the surface code error threshold
• Fast universal quantum control above the fault-tolerance threshold in silicon
• A Coherent Spin-Photon Interface in Silicon
• Universal control of a six-qubit quantum processor in silicon
• A four-qubit germanium quantum processor
• Strong spin-photon coupling in silicon
• The germanium quantum information route
• Silicon quantum processor unit cell operation above one Kelvin
• Fidelity benchmarks for two-qubit gates in silicon
• Qubits made by advanced semiconductor manufacturing
• Semiconductor Qubits In Practice
• Two-qubit silicon quantum processor with operation fidelity exceeding 99%
• Universal quantum logic in hot silicon qubits
• CMOS-based cryogenic control of silicon quantum circuits
• Shuttling a single charge across a one-dimensional array of silicon quantum dots
• Scaling silicon-based quantum computing using CMOS technology: State-of-the-art, Challenges and Perspectives
• A Crossbar Network for Silicon Quantum Dot Qubits
• Microwave-to-optics conversion using a mechanical oscillator in its quantum groundstate
• Reinforcement Learning with Neural Networks for Quantum Feedback
• Long-Range Microwave Mediated Interactions Between Electron Spins
• Silicon qubit fidelities approaching incoherent noise limits via pulse engineering
• A hole spin qubit in a fin field-effect transistor above 4 kelvin
• Bias-preserving gates with stabilized cat qubits
• A single-hole spin qubit
• Quantum error correction with silicon spin qubits
• Semiconductor Quantum Computation
• Tunable Coupling Architecture for Fixed-frequency Transmons
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• Quantum-Coherent Nanoscience
• Gate-based single-shot readout of spins in silicon
• The 2021 Quantum Materials Roadmap
• Ultrafast Hole Spin Qubit with Gate-Tunable Spin-Orbit Switch
• Ultracold polar molecules as qudits
• Single artificial atoms in silicon emitting at telecom wavelengths
• Low-frequency charge noise in Si/SiGe quantum dots
• Quantum information processing with bosonic qubits in circuit QED
• Quantum Dot Arrays in Silicon and Germanium
• Dissipative couplings in cavity magnonics
• Gate-reflectometry dispersive readout and coherent control of a spin qubit in silicon
• Quantum computers as universal quantum simulators: state-of-art and perspectives
• Gate-controlled quantum dots and superconductivity in planar germanium
• Ultrafast coherent control of a hole spin qubit in a germanium quantum dot
• Benchmarking Gate Fidelities in a Si/SiGe Two-Qubit Device
• Low-frequency spin qubit detuning noise in highly purified ${}^{28}$Si/SiGe
• Charge-noise spectroscopy of Si/SiGe quantum dots via dynamically-decoupled exchange oscillations
• Noisy intermediate-scale quantum computers
• Spin lifetime and charge noise in hot silicon quantum dot qubits
• Introduction to topological quantum computation with non-Abelian anyons
• Assessment of a silicon quantum dot spin qubit environment via noise spectroscopy
• The impact of classical control electronics on qubit fidelity
• Direct Rashba spin-orbit interaction in Si and Ge nanowires with different growth directions
• Loading a quantum-dot based "Qubyte" register
• Direct randomized benchmarking for multi-qubit devices
• Coherent spin qubit transport in silicon
• Quantum tomography of an entangled three-spin state in silicon
• Machine Learning techniques for state recognition and auto-tuning in quantum dots
• Conveyor-mode single-electron shuttling in Si/SiGe for a scalable quantum computing architecture
• High-fidelity operation and algorithmic initialisation of spin qubits above one kelvin
• Spiderweb array: A sparse spin-qubit array
• Excited states in bilayer graphene quantum dots
• Coherent transfer of quantum information in silicon using resonant SWAP gates
• A shuttling-based two-qubit logic gate for linking distant silicon quantum processors
• Integrated silicon qubit platform with single-spin addressability, exchange control and robust single-shot singlet-triplet readout
• Radio-frequency detected fast charge sensing in undoped silicon quantum dots
• Single-electron control in a foundry-fabricated two-dimensional qubit array
• Controlling spin-orbit interactions in silicon quantum dots using magnetic field direction
• Hole spin qubits in Si FinFETs with fully tunable spin-orbit coupling and sweet spots for charge noise
• Large, tunable valley splitting and single-spin relaxation mechanisms in a Si/Si${}_x$Ge${}_{1-x}$ quantum dot
• A silicon quantum-dot-coupled nuclear spin qubit
• Repetitive single electron spin readout in silicon
• Optimized cavity-mediated dispersive two-qubit gates between spin qubits
• Reducing charge noise in quantum dots by using thin silicon quantum wells
• Coherent spin control of s-, p-, d- and f-electrons in a silicon quantum dot
• Microwave photon-mediated interactions between semiconductor qubits
• Atomic fluctuations lifting the energy degeneracy in Si/SiGe quantum dots
• Electron-hole crossover in gate-controlled bilayer graphene quantum dots
• Rapid high-fidelity spin state readout in Si/SiGe quantum dots via radio-frequency reflectometry
• Resonantly driven singlet-triplet spin qubit in silicon
• Auto-tuning of double dot devices in situ with machine learning
• Radio-frequency capacitive gate-based sensing
• Distant spin entanglement via fast and coherent electron shuttling
• Blueprint of a scalable spin qubit shuttle device for coherent mid-range qubit transfer in disordered Si/SiGe/SiO${}_2$
• Single-spin qubits in isotopically enriched silicon at low magnetic field
• Single-electron double quantum dots in bilayer graphene
• SiGe quantum wells with oscillating Ge concentrations for quantum dot qubits
• Electrical manipulation of semiconductor spin qubits within the g-matrix formalism
• The SpinBus Architecture: Scaling Spin Qubits with Electron Shuttling
• Single-Spin Relaxation in a Synthetic Spin-Orbit Field
• Quantum nondemolition measurement of an electron spin qubit
• Probing quantum processor performance with pyGSTi
• Multicore Quantum Computing
• A programmable two-qubit solid-state quantum processor under ambient conditions
• Site-selective quantum control in an isotopically enriched 28Si/SiGe quadruple quantum dot
• A repetition code of 15 qubits
• Coherent microwave photon mediated coupling between a semiconductor and a superconductor qubit
• Colloquium: Advances in automation of quantum dot devices control
• A CMOS dynamic random access architecture for radio-frequency readout of quantum devices
• Experimental Characterization of Crosstalk Errors with Simultaneous Gate Set Tomography
• Spin readout of a CMOS quantum dot by gate reflectometry and spin-dependent tunnelling
• Shuttling an electron spin through a silicon quantum dot array
• Electric-field control and noise protection of the flopping-mode spin qubit
• Optimized electrical control of a Si/SiGe spin qubit in the presence of an induced frequency shift
• Charge detection in an array of CMOS quantum dots
• Dielectrics for Two-Dimensional Transition Metal Dichalcogenide Applications
• Assessment of error variation in high-fidelity two-qubit gates in silicon
• Computer-automated tuning procedures for semiconductor quantum dot arrays
• Geometric formalism for constructing arbitrary single-qubit dynamically corrected gates
• Single-shot readout of hole spins in Ge
• Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device
• Building a large-scale quantum computer with continuous-variable optical technologies
• Spin relaxation benchmarks and individual qubit addressability for holes in quantum dots
• Crosstalk analysis for single-qubit and two-qubit gates in spin qubit arrays
• Fast spin exchange between two distant quantum dots
• Strong electron-electron interactions in Si/SiGe quantum dots
• Repetitive quantum non-demolition measurement and soft decoding of a silicon spin qubit
• Simple model for electrical hole spin manipulation in semiconductor quantum dots: Impact of dot material and orientation
• Silicon quantum dot devices with a self-aligned second gate layer
• The SMART protocol -- Pulse engineering of a global field for robust and universal quantum computation
• Quantum Computing: An Overview Across the System Stack
• Multiplexed quantum transport using commercial off-the-shelf CMOS at sub-kelvin temperatures
• Single-electron spin resonance in a nanoelectronic device using a global field
• Flopping-mode electric dipole spin resonance
• Spin-EPR-pair separation by conveyor-mode single electron shuttling in Si/SiGe
• Experimental realization of a fast controlled-Z gate via a shortcut-to-adiabaticity
• Single-photon Emission from an Acoustically-driven Lateral Light-emitting Diode
• Tuning methods for semiconductor spin--qubits
• Two-qubit logic with anisotropic exchange in a fin field-effect transistor
• Efficient orthogonal control of tunnel couplings in a quantum dot array
• Semiconductor materials stacks for quantum dot spin qubits
• Variability of electron and hole spin qubits due to interface roughness and charge traps
• Simultaneous Operations in a Two-Dimensional Array of Singlet-Triplet Qubits
• Coupler-Assisted Controlled-Phase Gate with Enhanced Adiabaticity
• A Machine Learning Approach for Automated Fine-Tuning of Semiconductor Spin Qubits
• Spatial noise correlations beyond nearest-neighbor in ${}^{28}$Si/SiGe spin qubits
• High-fidelity geometric gate for silicon-based spin qubits
• Gate-Controlled Quantum Dots Based on Two-Dimensional Materials
• Quantum Computation Protocol for Dressed Spins in a Global Field
• First-principles hyperfine tensors for electrons and holes in GaAs and silicon
• Synthesizing Quantum-Circuit Optimizers
• Protocol for a resonantly-driven three-qubit Toffoli gate with silicon spin qubits
• Network architecture for a topological quantum computer in silicon
• Modelling semiconductor spin qubits and their charge noise environment for quantum gate fidelity estimation
• Coherence of a driven electron spin qubit actively decoupled from quasi-static noise
• Exchange coupling in a linear chain of three quantum-dot spin qubits in silicon
• Longitudinal and transverse electric field manipulation of hole spin-orbit qubits in one-dimensional channels
• Coherent control of electron spin qubits in silicon using a global field
• Hotter is easier: unexpected temperature dependence of spin qubit frequencies
• The critical role of substrate disorder in valley splitting in Si quantum wells
• A quadrupolar exchange-only spin qubit
• Geometric quantum speed limits and short-time accessibility to unitary operations
• Nonlinear response and crosstalk of electrically driven silicon spin qubits
• Ballistic supercurrent discretization and micrometer-long Josephson coupling in germanium
• Is all-electrical silicon quantum computing feasible in the long term?
• Spatial Noise Correlations in a Si/SiGe Two-Qubit Device from Bell State Coherences
• Strong photon coupling to the quadrupole moment of an electron in solid state
• Carrier and Spin Coherent Dynamics in Strained Germanium-Tin Semiconductor on Silicon
• Electromagnetic control of valley splitting in ideal and disordered Si quantum dots
• Grover's algorithm in a four-qubit silicon processor above the fault-tolerant threshold
• Spin of a multielectron quantum dot and its interaction with a neighboring electron
• Parity-to-charge conversion for readout of topological Majorana qubits
• Coherent spin-valley oscillations in silicon
• Fast charge sensing of Si/SiGe quantum dots via a high-frequency accumulation gate
• Resource reduction for distributed quantum information processing using quantum multiplexed photons
• Simulated coherent electron shuttling in silicon quantum dots
• Fast high-fidelity entangling gates for spin qubits in Si double quantum dots
• Ultrafast and Electrically Tunable Rabi Frequency in a Germanium Hut Wire Hole Spin Qubit
• Hybrid superconductor-semiconductor systems for quantum technology
• Interplay of charge noise and coupling to phonons in adiabatic electron transfer between quantum dots
• Elliott-Yafet Spin-Phonon Relaxation Times from First Principles
• Valley interference and spin exchange at the atomic scale in silicon
• Microwave-optical coupling via Rydberg excitons in cuprous oxide
• Correlated spectrum of distant semiconductor qubits coupled by microwave photons
• Ray-based framework for state identification in quantum dot devices
• Single and Double Hole Quantum Dots in Strained Ge/SiGe Quantum Wells
• Adiabatic electron charge transfer between two quantum dots in presence of 1/f noise
• Clifford-deformed Surface Codes
• Relationship between costs for quantum error mitigation and non-Markovian measures
• Charge noise and overdrive errors in reflectometry-based charge, spin and Majorana qubit readout
• Fabrication process and failure analysis for robust quantum dots in silicon
• High-fidelity gate set for exchange-coupled singlet-triplet qubits
• Conditional Teleportation of Quantum-Dot Spin States
• Two-body Wigner molecularization in asymmetric quantum dot spin qubits
• Observation of Highly Nonlinear Resistive Switching of Al2O3/TiO2-x Memristors at Cryogenic Temperature (1.5 K)
• A singlet-triplet hole-spin qubit in MOS silicon
• A fast quantum interface between different spin qubit encodings
• Spin-Blockade Spectroscopy of Si/SiGe Quantum Dots
• Deep reinforcement learning for universal quantum state preparation via dynamic pulse control
• Electric-field tuning of the valley splitting in silicon corner dots
• Analytically parameterized solutions for robust quantum control using smooth pulses
• Trapping electrons in a room-temperature microwave Paul trap
• Braiding and fusion of non-Abelian vortex anyons
• Pulsed-gate spectroscopy of single-electron spin states in bilayer graphene quantum dots
• Measurements of capacitive coupling within a quadruple quantum dot array
• Magnetic Gradient Fluctuations from Quadrupolar ${}^{73}$Ge in Si/SiGe Exchange-Only Qubits
• Hole-phonon interactions in quantum dots: Effects of phonon confinement and encapsulation materials on spin-orbit qubits
• Bell-state tomography in a silicon many-electron artificial molecule
• Controlling Synthetic Spin-Orbit Coupling in a Silicon Quantum Dot with Magnetic Field
• Valley two-qubit system in a MoS${}_2$-monolayer gated double quantum dot
• Low dephasing and robust micromagnet designs for silicon spin qubits
• Adiabatic two-qubit gates in capacitively coupled quantum dot hybrid qubits
• Conditional dispersive readout of a CMOS quantum dot via an integrated transistor circuit
• Miniaturizing neural networks for charge state autotuning in quantum dots
• High-fidelity single-qubit gates in a strongly driven quantum dot hybrid qubit with $1/f$ charge noise
• Fast Bayesian tomography of a two-qubit gate set in silicon
• Robust Quantum Gates against Correlated Noise in Integrated Quantum Chips
• Cavity-enhanced single-shot readout of a quantum dot spin within 3 nanoseconds
• Spin decoherence in a two-qubit CPHASE gate: the critical role of tunneling noise
• Splitting of conductance resonance through a magnetic quantum dot in graphene
• Dipole coupling of a tunable hole double quantum dot in germanium hut wire to a microwave resonator
• A Spin Quintet in a Silicon Double Quantum Dot: Spin Blockade and Relaxation
• Impact of valley phase and splitting on readout of silicon spin qubits
• Coherent transport of spin by adiabatic passage in quantum dot arrays
• 30 GHz-voltage controlled oscillator operating at 4 K
• Pulse sequence designed for robust C-phase gates in SiMOS and Si/SiGe double quantum dots
• Interface and electromagnetic effects in the valley splitting of Si quantum dots
• All-Electrical Control of an Electron Spin/Valley Quantum Bit in SOI CMOS Technology
• Enhancing the dipolar coupling of a $S$-$T_0$ qubit with a transverse sweet spot
• Split-Gate Cavity Coupler for Silicon Circuit Quantum Electrodynamics
• High-fidelity and robust two-qubit gates for quantum-dot spin qubits in silicon
• Electron cascade for spin readout
• High-Fidelity Entangling Gates for Quantum-Dot Hybrid Qubits Based on Exchange Interactions
• An ultra-stable 1.5 tesla permanent magnet assembly for qubit experiments at cryogenic temperatures
• Autonomous estimation of high-dimensional Coulomb diamonds from sparse measurements
• On-chip Integration of Si/SiGe-based Quantum Dots and Switched-capacitor Circuits
• A Silicon Surface Code Architecture Resilient Against Leakage Errors
• Dispersive sensing of charge states in a bilayer graphene quantum dot
• Electro-optomechanical equivalent circuits for quantum transduction
• Programmable two-qubit gates in capacitively coupled flopping-mode spin qubits
• Cryogen-free scanning gate microscope for the characterization of Si/Si${}_{0.7}$Ge${}_{0.3}$ quantum devices at milli-Kelvin temperatures
• Classification and magic magnetic-field directions for spin-orbit-coupled double quantum dots
• Crosstalk analysis for simultaneously driven two-qubit gates in spin qubit arrays
• Highly tunable quadruple quantum dot in a narrow bandgap semiconductor InAs nanowire
• Robust energy selective tunneling readout of singlet triplet qubits under large magnetic field gradient
• Simulation of 1/f charge noise affecting a quantum dot in a Si/SiGe structure
• Crosstalk- and charge-noise-induced multiqubit decoherence in exchange-coupled quantum dot spin qubit arrays
• Protecting Quantum Information in Quantum Dot Spin Chains by Driving Exchange Interactions Periodically
• Spin-Valley Qubit Dynamics In Exchange Coupled Silicon Quantum Dots
• Phonon-assisted relaxation and decoherence of singlet-triplet qubits in Si/SiGe quantum dots
• G-factor of electrons in gate-defined quantum dots in a strong in-plane magnetic field
• Theory of barrier vs tilt exchange gate operations in spin-based quantum computing
• SpinQ: Compilation strategies for scalable spin-qubit architectures
• Electrical operation of hole spin qubits in planar MOS silicon quantum dots
• Effect of quantum Hall edge strips on valley splitting in silicon quantum wells
• Pushing Purcell-enhancement beyond its limits
• Determination of spin-orbit interaction in semiconductor nanostructures via non-linear transport
• Interacting holes in Si and Ge double quantum dots: from a multiband approach to an effective-spin picture
• Mode-Dependent Loss Model for Multimode Photon-Subtracted States
• Interplay of exchange and superexchange in triple quantum dots
• Extending qubit coherence by adaptive quantum environment learning
• Origin of giant valley splitting in silicon quantum wells induced by superlattice barriers
• Indications of a soft cutoff frequency in the charge noise of a Si/SiGe quantum dot spin qubit
• Modelling of spin decoherence in a Si hole qubit perturbed by a single charge fluctuator
• A sparse spin qubit array with integrated control electronics
• Discrete time crystal in the gradient field Heisenberg model
• Tunable interdot coupling in few-electron bilayer graphene double quantum dots
• Valley-Free Silicon Fins Caused by Shear Strain
• A low-disorder Metal-Oxide-Silicon double quantum dot
• Quantum tomography benchmarking
• Atomistic compositional details and their importance for spin qubits in isotope-purified silicon-germanium quantum wells
• A Multiscale Simulation Approach for Germanium-Hole-Based Quantum Processor
• Benchmarking Quantum State Transfer on Quantum Devices using Spatio-Temporal Steering
• Valley splitting depending on the size and location of a silicon quantum dot
• Optimization of Quantum-dot Qubit Fabrication via Machine Learning
• Spin-photon coupling for atomic qubit devices in silicon
• Theory of valley-resolved spectroscopy of a Si triple quantum dot coupled to a microwave resonator
• Microwave-resonator-detected excited-state spectroscopy of a double quantum dot
• Single-tone pulse sequences and robust two-tone shaped pulses for three silicon spin qubits with always-on exchange
• Feasibility of single-shot realizations of conditional three-qubit gates in exchange-coupled qubit arrays with local control
• Optical Detection and Storage of Entanglement in Plasmonically Coupled Quantum Dot Qubits
• Robust implementation of quantum gates despite always-on exchange coupling in silicon double quantum dots
• Improving mobility of silicon metal-oxide-semiconductor devices for quantum dots by high vacuum activation annealing
• Data needs and challenges for quantum dot devices automation
• Universal classical optical computing inspired by quantum information process
• Universal quantum state preparation via revised greedy algorithm
• Devitalizing noise-driven instability of entangling logic in silicon devices with bias controls
• Towards a realistic GaAs-spin qubit device for a classical error-corrected quantum memory
• Democratizing Spin Qubits
• Modular nanomagnet design for spin qubits confined in a linear chain
• Tuning spatial entanglement in interacting few-electron quantum dots
• Violating Bell's inequality in gate-defined quantum dots
• Single-step high-fidelity three-qubit gates by anisotropic chiral interactions
• Scalable entanglement of nuclear spins mediated by electron exchange
• Calculation of tunnel-couplings in open gate-defined disordered quantum dot systems
• Enhanced quantum state preparation via stochastic prediction of neural network
• Balancing coherent and dissipative dynamics in a central-spin system
• Rydberg Entangling Gates in Silicon
• Voltage-controlled Hubbard spin transistor
• Autonomous Bootstrapping of Quantum Dot Devices
• Spin-Orbit Interaction Enabled High-Fidelity Two-Qubit Gates
• Characterization and tomography of a hidden qubit
• Entangling gates on degenerate spin qubits dressed by a global field
• Photo-assisted spin transport in double quantum dots with spin-orbit interaction
• Effective out-of-plane g-factor in strained-Ge/SiGe quantum dots
• Fast high-fidelity geometric gates for singlet-triplet qubits
• Designing high-fidelity multi-qubit gates for semiconductor quantum dots through deep reinforcement learning
• Compressed gate characterization for quantum devices with time-correlated noise
• Designing arbitrary single-axis rotations robust against perpendicular time-dependent noise
• Anisotropy with respect to the applied magnetic field of spin qubit decoherence times
• Near-Term Spin-Qubit Architecture Design via Multipartite Maximally-Entangled States
• Optimal choice of state tomography quorum formed by projection operators
• Phonon-induced decoherence of a charge quadrupole qubit
• High-fidelity CNOT gate for spin qubits with asymmetric driving using virtual gates
• Developing high-impedance superconducting resonators and on-chip filters for semiconductor quantum dot circuit quantum electrodynamics
• Universal quantum computation with symmetric qubit clusters coupled to an environment
• beSnake: A routing algorithm for scalable spin-qubit architectures
• Singlet-triplet-state readout in silicon-metal-oxide-semiconductor double quantum dots
• All-Electrical Control of a Hybrid Electron Spin/Valley Quantum Bit in SOI CMOS Technology
• Integrated multiplexed microwave readout of silicon quantum dots in a cryogenic CMOS chip
• Charge-noise resilience of two-electron quantum dots in Si/SiGe heterostructures
• Controlled quantum dot array segmentation via a highly tunable interdot tunnel coupling
• Fidelity of a sequence of SWAP operations on a spin chain
• eQASM: An Executable Quantum Instruction Set Architecture
• Compressed Optimization of Device Architectures (CODA) for semiconductor quantum devices
• Exact analytical treatment of multiqubit noisy dynamics in exchange-coupled semiconductor spin qubits
• Neural-network-designed three-qubit gates robust against charge noise and crosstalk in silicon
• Exfoliated hexagonal BN as gate dielectric for InSb nanowire quantum dots with improved gate hysteresis and charge noise
• Visual explanations of machine learning model estimating charge states in quantum dots
• Iteration Complexity of Variational Quantum Algorithms
• Genuinely noncyclic geometric gates in two-pulse schemes
• Experimental implementation of arbitrary entangled operations
• Realization of Constant-Depth Fan-Out with Real-Time Feedforward on a Superconducting Quantum Processor
• Tailoring potentials by simulation-aided design of gate layouts for spin qubit applications
• Novel characterisation of dopant-based qubits
• Robust entangling gate for capacitively coupled few-electron singlet-triplet qubits
• Spin-qubit noise spectroscopy from randomized benchmarking by supervised learning
• Evaluating Three Levels of Quantum Metrics on Quantum-Inspire Hardware
• Kondo enhancement of current induced spin accumulation in a quantum dot
• Measurement of enhanced spin-orbit coupling strength for donor-bound electron spins in silicon
• Controlling phase diagram of finite spin-$1/2$ chains by tuning boundary interactions
• Experimental online quantum dots charge autotuning using neural networks
• Transmission based tomography for spin qubits
• Computational Assessment of Silicon Quantum Gate Based on Detuning Mechanism for Quantum Computing
• Multi-qubit DC gates over an inhomogeneous array of quantum dots
• Few-electrode design for silicon MOS quantum dots
• Integration of Cobalt Ferromagnetic Control Gates for Electrical and Magnetic Manipulation of Semiconductor Quantum Dots
• Proposal for a cavity-induced measurement of the exchange coupling in quantum dots
• Tailoring Dynamical Codes for Biased Noise: The X${}^3$Z${}^3$ Floquet Code
• Wavelet correlation noise analysis for qubit operation variable time series
• Robust quantum dots charge autotuning using neural network uncertainty
• Pursuing high-fidelity control of spin qubits in natural Si/SiGe quantum dot
• Universal control of superexchange in linear triple quantum dots with an empty mediator
• Quantum resources in Harrow-Hassidim-Lloyd algorithm
• Resonator-mediated quantum gate between distant charge qubits
• Rapid adiabatic gating for capacitively coupled quantum dot hybrid qubits without barrier control
• Quantum computing hardware in the cloud: Should a computational chemist care?
• A Theory of Direct Randomized Benchmarking
• Reachability in Controlled Markovian Quantum Systems: An Operator-Theoretic Approach
• Towards hole-spin qubits in Si pMOSFETs within a planar CMOS foundry technology
• Decoherence in Exchange-Coupled Quantum Spin Qubit Systems: Impact of Multiqubit Interactions and Geometric Connectivity
• Stroboscopically Robust Gates For Capacitively Coupled Singlet-Triplet Qubits
• Variational quantum compiling for three-qubit gates design in quantum dots
• Performance Assessment of Resonantly Driven Silicon Two-Qubit Quantum Gate
• Fast spin-valley-based quantum gates in Si with micromagnets
• Measurement-Based Entanglement of Semiconductor Spin Qubits
• A SWAP Gate for Spin Qubits in Silicon
• Correcting on-chip distortion of control pulses with silicon spin qubits
• Universal singlet-triplet qubits implemented near the transverse sweet spot
• Simulating decoherence of two coupled spins using the generalized cluster correlation expansion
• The Parity Flow Formalism: Tracking Quantum Information Throughout Computation
• Four electron spin qubits with exchange interaction
• Universal quantum computation and quantum error correction with ultracold atomic mixtures
• Quantum gates in coupled quantum dots controlled by coupling modulation
• A generalized model of the noise spectrum of a two-level fluctuator in the presence of an electron subbath
• Mitigating Temporal Fragility in the XY Surface Code
• Tradeoff between noise and banding in a quantum adder with qudits
• Highly Tunable Two-Qubit Interactions in Si/SiGe Quantum Dots by Interchanging the Roles of Qubit-Defining Gates
• Single G centers in silicon fabricated by co-implantation with carbon and proton
• Parallel two-qubit entangling gates via a quantum nondemolition interaction controlled by rotation
• Effects of leakage on the realization of a discrete time crystal in a chain of singlet-triplet qubits
• A context-aware gate set tomography characterization of superconducting qubits
• Silicon Donor Array as a Disordered One-Dimensional Electron Gas
• Certification of spin-based quantum simulators
• Quantum dynamics of spin-J particles in static and rotating magnetic fields: Entanglement resonances and kinks
• Quantum Transport in 40-nm MOSFETs at Deep-Cryogenic Temperatures
• Long-distance coupling of spin qubits via topological magnons
• Exploring entanglement resource in Si quantum dot systems with operational quasiprobability approach
• Inter- and intra-band Coulomb interactions between holes in silicon nanostructures
• Limitations on the maximal level of entanglement of two singlet-triplet qubits in GaAs quantum dots
• Quantum entanglement response to pulsed gate modulation
• Enhanced local addressability of a spin array with local exchange pulses and global microwave driving
• Designs for a two-dimensional Si quantum dot array with spin qubit addressability
• PyCCE: A Python Package for Cluster Correlation Expansion Simulations of Spin Qubit Dynamic
• Non-Markovianity Benefits Quantum Dynamics Simulation
• High-temperature operation of a silicon qubit
• Exploring Entanglement Spectrum and Phase Diagram in multi-electron Quantum Dot Chains