Reduced sensitivity to charge noise in semiconductor spin qubits via symmetric operation

Abstract

We demonstrate improved operation of exchange-coupled semiconductor quantum dots by substantially reducing the sensitivity of exchange operations to charge noise. The method involves biasing a double-dot symmetrically between the charge-state anti-crossings, where the derivative of the exchange energy with respect to gate voltages is minimized. Exchange remains highly tunable by adjusting the tunnel coupling. We find that this method reduces the dephasing effect of charge noise by more than a factor of five in comparison to operation near a charge-state anti-crossing, increasing the number of observable exchange oscillations in our qubit by a similar factor. Performance also improves with exchange rate, favoring fast quantum operations.

10 pages, 8 figures

References in corpus (29)

• Quantum Computation with Quantum Dots
• Coherent control of a single electron spin with electric fields
• An addressable quantum dot qubit with fault-tolerant control fidelity
• A Two Qubit Logic Gate in Silicon
• Universal Quantum Computation with the Exchange Interaction
• 1/f noise: implications for solid-state quantum information
• Relaxation, dephasing, and quantum control of electron spins in double quantum dots
• Electrometry Using Coherent Exchange Oscillations in a Singlet-Triplet-Qubit
• Quantum control and process tomography of a semiconductor quantum dot hybrid qubit
• Self-Consistent Measurement and State Tomography of an Exchange-Only Spin Qubit
• Noise suppression using symmetric exchange gates in spin qubits
• Two-qubit Gate of Combined Single Spin Rotation and Inter-dot Spin Exchange in a Double Quantum Dot
• Charge and spin state readout of a double quantum dot coupled to a resonator
• A Reconfigurable Gate Architecture for Si/SiGe Quantum Dots
• Electrically-protected resonant exchange qubits in triple quantum dots
• Robust quantum gates for singlet-triplet spin qubits using composite pulses
• Valley-based noise-resistant quantum computation using Si quantum dots
• Robustness of composite pulses to time-dependent control noise
• Charge Relaxation in a Single Electron Si/SiGe Double Quantum Dot
• Quantum manipulation of two-electron spin states in metastable double quantum dots
• Coherence and Screening in Multi-Electron Spin Qubits
• High-Fidelity Single-Qubit Gates for Two-Electron Spin Qubits in GaAs
• Exchange-based CNOT gates for singlet-triplet qubits with spin orbit interaction
• Characterizing gate operations near the sweet spot of an exchange-only qubit
• Filter function formalism beyond pure dephasing and non-Markovian noise in singlet-triplet qubits
• Hyperfine-Induced Decay in Triple Quantum Dots
• Noise-compensating pulses for electrostatically controlled silicon spin qubits
• High Fidelity Singlet-Triplet $S$-$T_{-}$ Qubits in Inhomogeneous Magnetic Fields
• Charge-noise tolerant exchange gates of singlet-triplet qubits in asymmetric double quantum dots

Cited by in corpus (204)

• A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
• A programmable two-qubit quantum processor in silicon
• Semiconductor Spin Qubits
• Interfacing spin qubits in quantum dots and donors - hot, dense and coherent
• Quantum CNOT Gate for Spins in Silicon
• Computing with spin qubits at the surface code error threshold
• Fast universal quantum control above the fault-tolerance threshold in silicon
• Silicon CMOS architecture for a spin-based quantum computer
• The germanium quantum information route
• Semiconductor Qubits In Practice
• Quantum simulation of a Fermi-Hubbard model using a semiconductor quantum dot array
• Two-qubit silicon quantum processor with operation fidelity exceeding 99%
• Universal quantum logic in hot silicon qubits
• Fast two-qubit logic with holes in germanium
• Scaling silicon-based quantum computing using CMOS technology: State-of-the-art, Challenges and Perspectives
• A Crossbar Network for Silicon Quantum Dot Qubits
• Noise suppression using symmetric exchange gates in spin qubits
• Coherent control of single electrons: a review of current progress
• Local and Distributed Quantum Computation
• Superconductor-semiconductor hybrid cavity quantum electrodynamics
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• A singlet triplet hole spin qubit in planar Ge
• Gate-reflectometry dispersive readout and coherent control of a spin qubit in silicon
• Benchmarking Gate Fidelities in a Si/SiGe Two-Qubit Device
• Universal logic with encoded spin qubits in silicon
• Charge-noise spectroscopy of Si/SiGe quantum dots via dynamically-decoupled exchange oscillations
• The impact of classical control electronics on qubit fidelity
• Direct Rashba spin-orbit interaction in Si and Ge nanowires with different growth directions
• High-fidelity quantum gates in Si/SiGe double quantum dots
• Roadmap for gallium arsenide spin qubits
• Roadmap on quantum nanotechnologies
• Quantum tomography of an entangled three-spin state in silicon
• Tunable superconducting coupling of quantum dots via Andreev bound states in semiconductor-superconductor nanowires
• Notch filtering the nuclear environment of a spin qubit
• Machine Learning techniques for state recognition and auto-tuning in quantum dots
• Coherent spin state transfer via Heisenberg exchange
• High-fidelity operation and algorithmic initialisation of spin qubits above one kelvin
• Electrically Protected Valley-Orbit Qubits in Silicon
• Three-electron spin qubits
• 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
• Extending the coherence of a quantum dot hybrid qubit
• Repetitive single electron spin readout in silicon
• Quantifying error and leakage in an encoded Si/SiGe triple-dot qubit
• Resonantly driven singlet-triplet spin qubit in silicon
• A flexible design platform for Si/SiGe exchange-only qubits with low disorder
• Cavity QED with hybrid nanocircuits: from atomic-like physics to condensed matter phenomena
• Recent advances in hole-spin qubits
• All-Microwave Control and Dispersive Readout of Gate-Defined Quantum Dot Qubits in Circuit Quantum Electrodynamics
• Sweet-spot operation of a germanium hole spin qubit with highly anisotropic noise sensitivity
• Strong coupling between an electron in a quantum dot circuit and a photon in a cavity
• Noise-correlation spectrum for a pair of spin qubits in silicon
• Adiabatic quantum state transfer in a semiconductor quantum-dot spin chain
• Fast and high-fidelity state preparation and measurement in triple-quantum-dot spin qubits
• Charge-noise-insensitive gate operations for always-on, exchange-only qubits
• A logical qubit in a linear array of semiconductor quantum dots
• A decoherence-free subspace in a charge quadrupole qubit
• Quantum simulation of antiferromagnetic Heisenberg chain with gate-defined quantum dots
• Crosstalk analysis for single-qubit and two-qubit gates in spin qubit arrays
• Fast spin exchange between two distant quantum dots
• Quantum Computing: An Overview Across the System Stack
• State-conditional coherent charge qubit oscillations in a Si/SiGe quadruple quantum dot
• Universal control of four singlet-triplet qubits
• Coupling of three-spin qubits to their electric environment
• A 300 mm foundry silicon spin qubit unit cell exceeding 99% fidelity in all operations
• Detuning Axis Pulsed Spectroscopy of Valley-Orbital States in Si/SiGe Quantum Dots
• Optimal dispersive readout of a spin qubit with a microwave resonator
• Randomized benchmarking of barrier versus tilt control of a singlet-triplet qubit
• Coherent control and spectroscopy of a semiconductor quantum dot Wigner molecule
• Efficient orthogonal control of tunnel couplings in a quantum dot array
• Universality of Schmidt decomposition and particle identity
• Negative spin exchange in a multielectron quantum dot
• Symmetric Operation of the Resonant Exchange Qubit
• Modelling semiconductor spin qubits and their charge noise environment for quantum gate fidelity estimation
• Exchange coupling in a linear chain of three quantum-dot spin qubits in silicon
• Tunable coupling and isolation of single electrons in silicon metal-oxide-semiconductor quantum dots
• Hotter is easier: unexpected temperature dependence of spin qubit frequencies
• A quadrupolar exchange-only spin qubit
• Long-Distance Superexchange between Semiconductor Quantum-Dot Electron Spins
• Crosstalk error correction through dynamical decoupling of single-qubit gates in capacitively coupled singlet-triplet semiconductor spin qubits
• Efficient Pulse-Excitation Techniques for Single Photon Sources from Quantum Dots in Cavities
• Spin of a multielectron quantum dot and its interaction with a neighboring electron
• Rapid single-shot parity spin readout in a silicon double quantum dot with fidelity exceeding 99 %
• Coherent multi-spin exchange coupling in a quantum-dot spin chain
• Simulation of 1D topological phases in driven quantum dot arrays
• Fast high-fidelity entangling gates for spin qubits in Si double quantum dots
• Filter function formalism beyond pure dephasing and non-Markovian noise in singlet-triplet qubits
• High-fidelity gate set for exchange-coupled singlet-triplet qubits
• Entangling Spins in Double Quantum Dots and Majorana Bound States
• Braiding-based quantum control of a Majorana qubit built from quantum dots
• The exchange-only singlet-only spin qubit
• Quantum-limited measurement of spin qubits via curvature coupling to a cavity
• Two-body Wigner molecularization in asymmetric quantum dot spin qubits
• Spin-Blockade Spectroscopy of Si/SiGe Quantum Dots
• A fast quantum interface between different spin qubit encodings
• Conditional Teleportation of Quantum-Dot Spin States
• Measurements of capacitive coupling within a quadruple quantum dot array
• Bell-state tomography in a silicon many-electron artificial molecule
• Magnetic Gradient Fluctuations from Quadrupolar ${}^{73}$Ge in Si/SiGe Exchange-Only Qubits
• Bounds to electron spin qubit variability for scalable CMOS architectures
• Adiabatic two-qubit gates in capacitively coupled quantum dot hybrid qubits
• Acoustic Traps and Lattices for Electrons in Semiconductors
• Floquet-Enhanced Spin Swaps
• Noise filtering of composite pulses for singlet-triplet qubits
• Resonant Exchange Operation in Triple-Quantum-Dot Qubits for Spin-Photon Transduction
• Pulse sequences for suppressing leakage in single-qubit gate operations
• Spin decoherence in a two-qubit CPHASE gate: the critical role of tunneling noise
• Coherent transport of spin by adiabatic passage in quantum dot arrays
• Signatures of atomic-scale structure in the energy dispersion and coherence of a Si quantum-dot qubit
• Robust population inversion in three-level systems by composite pulses
• Stabilization and manipulation of multispin states in quantum-dot time crystals with Heisenberg interactions
• Influence of electron-phonon scattering for an on-demand quantum dot single-photon source using cavity-assisted adiabatic passage
• Pulse sequence designed for robust C-phase gates in SiMOS and Si/SiGe double quantum dots
• CMOS Quantum Computing: Toward A Quantum Computer System-on-Chip
• Negative exchange interactions in coupled few-electron quantum dots
• Fast pulse sequences for dynamically corrected gates in single-triplet qubits
• Modulated longitudinal gates on encoded spin-qubits via curvature couplings to a superconducting cavity
• Enhancing the dipolar coupling of a $S$-$T_0$ qubit with a transverse sweet spot
• High-Fidelity Entangling Gates for Quantum-Dot Hybrid Qubits Based on Exchange Interactions
• A tunable hybrid qubit in a triple quantum dot
• A Silicon Surface Code Architecture Resilient Against Leakage Errors
• Tomography of entangling two-qubit logic operations in exchange-coupled donor electron spin qubits
• An automated approach for consecutive tuning of quantum dot arrays
• Exchange interaction of hole-spin qubits in double quantum dots in highly anisotropic semiconductors
• Highly tunable exchange-only singlet-only qubit in a GaAs triple quantum dot
• Crosstalk analysis for simultaneously driven two-qubit gates in spin qubit arrays
• Protecting Quantum Information in Quantum Dot Spin Chains by Driving Exchange Interactions Periodically
• G-factor of electrons in gate-defined quantum dots in a strong in-plane magnetic field
• Coherent control of a triangular exchange-only spin qubit
• Phonon-assisted relaxation and decoherence of singlet-triplet qubits in Si/SiGe quantum dots
• Theory of barrier vs tilt exchange gate operations in spin-based quantum computing
• Suppression of charge noise using barrier control of a singlet-triplet qubit
• Low-Error Operation of Spin Qubits with Superexchange Coupling
• High-precision real-space simulation of electrostatically-confined few-electron states
• Valley filtering and spatial maps of coupling between silicon donors and quantum dots
• Materials for Quantum Technologies: a Roadmap for Spin and Topology
• Coulomb interaction-driven entanglement of electrons on helium
• Tunable interdot coupling in few-electron bilayer graphene double quantum dots
• Neural network based deep learning analysis of semiconductor quantum dot qubits for automated control
• Optimization of Quantum-dot Qubit Fabrication via Machine Learning
• Dynamically corrected gates in silicon singlet-triplet spin qubits
• Error correction for gate operations in systems of exchange-coupled singlet-triplet qubits in double quantum dots
• Data needs and challenges for quantum dot devices automation
• Limits to Quantum Gate Fidelity from Near-Field Thermal and Vacuum Fluctuations
• Two-qubit CZ gates robust against charge noise in silicon while compensating for crosstalk using neural network
• Single-tone pulse sequences and robust two-tone shaped pulses for three silicon spin qubits with always-on exchange
• Extended orbital modeling of spin qubits in double quantum dots
• Extended Hubbard model describing small multi-dot arrays in bilayer graphene
• Devitalizing noise-driven instability of entangling logic in silicon devices with bias controls
• Democratizing Spin Qubits
• Designing globally optimal entangling gates using geometric space curves
• Single-step high-fidelity three-qubit gates by anisotropic chiral interactions
• Low-temperature environments for quantum computation and quantum simulation
• Voltage-controlled Hubbard spin transistor
• Protected Solid-State Qubits
• Symmetry-controlled singlet-triplet transition in a double-barrier quantum ring
• Efficient Two-Qubit Pulse Sequences Beyond CNOT
• Charge noise suppression in capacitively coupled singlet-triplet spin qubits under magnetic field
• High-fidelity CNOT gate for spin qubits with asymmetric driving using virtual gates
• Tunable charge qubit based on barrier-controlled triple quantum dots
• Acceptor-based qubit in silicon with tunable strain
• Simulation of Coupling Strength of Capacitively Coupled Singlet-Triplet Qubits
• Magic angle for barrier-controlled double quantum dots
• Hybrid Exchange Measurement-Based Qubit Operations in Semiconductor Double Quantum Dot Qubits
• Compressed Optimization of Device Architectures (CODA) for semiconductor quantum devices
• High-fidelity two-qubit gates via dynamical decoupling of local 1/f noise at optimal point
• Superconducting-semiconducting voltage-tunable qubits in the third dimension
• Robust entangling gate for capacitively coupled few-electron singlet-triplet qubits
• Dissipation and gate timing errors in SWAP operations of qubits
• A robust operating point for capacitively coupled singlet-triplet qubits
• Leveraging Off-the-Shelf Silicon Chips for Quantum Computing
• Enhancing qubit readout with Bayesian Learning
• Microscopic theory on magnetic-field-tuned sweet spot of exchange interactions in multielectron quantum-dot systems
• Latched readout for the quantum dot hybrid qubit
• Quantum Computation by Spin Parity Measurements with Encoded Spin Qubits
• Operating two exchange-only qubits in parallel
• Spin-orbit signatures in the dynamics of singlet-triplet qubits in double quantum dots
• Sign-switching of superexchange mediated by few electrons under non-uniform magnetic field
• Computational Assessment of Silicon Quantum Gate Based on Detuning Mechanism for Quantum Computing
• Theory on electron-phonon spin dehphasing in GaAs multi-electron double quantum dots
• Pauli Spin Blockade in a Resonant Triple Quantum Dot Molecule
• 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
• A diverse set of two-qubit gates for spin qubits in semiconductor quantum dots
• A dressed singlet-triplet qubit in germanium
• Ab initio modelling of quantum dot qubits: Coupling, gate dynamics and robustness versus charge noise
• Singlet-only Always-on Gapless Exchange Qubits with Baseband Control
• Minimal Non-orthogonal Gate Decomposition for Qubits with Limited Control
• Effect of device design on charge offset drift in Si/SiO${}_2$ single electron devices
• Performance Assessment of Resonantly Driven Silicon Two-Qubit Quantum Gate
• Quantum gates in coupled quantum dots controlled by coupling modulation
• Highly Tunable Two-Qubit Interactions in Si/SiGe Quantum Dots by Interchanging the Roles of Qubit-Defining Gates
• Transport-induced suppression of nuclear field fluctuations in multi-quantum-dot systems
• Decoherence and fidelity enhancement during shuttling of entangled spin qubits
• Model validation and error attribution for a drifting qubit
• Control of threshold voltages in Si/SiGe quantum devices via optical illumination
• Measuring and correcting nanosecond pulse distortions in quantum-dot spin qubits
• Jenga-Krotov algorithm: Efficient compilation of multi-qubit gates for exchange-only qubits
• Limitations on the maximal level of entanglement of two singlet-triplet qubits in GaAs quantum dots
• Robust iSWAP gates for semiconductor spin qubits with local driving
• Exploring Entanglement Spectrum and Phase Diagram in multi-electron Quantum Dot Chains
• Realizable time crystal of four silicon quantum dot qubits
• Extending Qubit Coherence Time via Hybrid Dynamical Decoupling
• Sweet-spot protection of hole spins in sparse arrays via spin-dependent magnetotunneling