Site-selective quantum control in an isotopically enriched 28Si/SiGe quadruple quantum dot

Abstract

Silicon spin qubits are a promising quantum computing platform offering long coherence times, small device sizes, and compatibility with industry-backed device fabrication techniques. In recent years, high fidelity single-qubit and two-qubit operations have been demonstrated in Si. Here, we demonstrate coherent spin control in a quadruple quantum dot fabricated using isotopically enriched 28Si. We tune the ground state charge configuration of the quadruple dot down to the single electron regime and demonstrate tunable interdot tunnel couplings as large as 20 GHz, which enables exchange-based two-qubit gate operations. Site-selective single spin rotations are achieved using electric dipole spin resonance in a magnetic field gradient. We execute a resonant-CNOT gate between two adjacent spins in 270 ns.

References in corpus (37)

• Quantum Computation with Quantum Dots
• Quantum Simulation
• Spins in few-electron quantum dots
• Single-shot read-out of an individual electron spin in a quantum dot
• Silicon Quantum Electronics
• 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
• Electrically driven single electron spin resonance in a slanting Zeeman field
• Realization of Three-Qubit Quantum Error Correction with Superconducting Circuits
• Quantum CNOT Gate for Spins in Silicon
• Manipulation of a single charge in a double quantum dot
• Fidelity benchmarks for two-qubit gates in silicon
• Quantum simulation of a Fermi-Hubbard model using a semiconductor quantum dot array
• Scalable gate architecture for densely packed semiconductor spin qubits
• Coherent single electron spin control in a slanting Zeeman field
• Shuttling a single charge across a one-dimensional array of silicon quantum dots
• Silicon qubit fidelities approaching incoherent noise limits via pulse engineering
• Differential Charge Sensing and Charge Delocalization in a Tunable Double Quantum Dot
• A Reconfigurable Gate Architecture for Si/SiGe Quantum Dots
• Benchmarking Gate Fidelities in a Si/SiGe Two-Qubit Device
• Single-Spin CCD
• Loading a quantum-dot based "Qubyte" register
• High-fidelity quantum gates in Si/SiGe double quantum dots
• Quantum Decoherence of the Central Spin in a Sparse System of Dipolar Coupled Spins
• Quantum simulation of Fermi-Hubbard models in semiconductor quantum dot arrays
• Robust micro-magnet design for fast electrical manipulations of single spins in quantum dots
• A 2x2 quantum dot array with controllable inter-dot tunnel couplings
• Automated tuning of inter-dot tunnel couplings in quantum dot arrays
• A cryogenic amplifier for fast real-time detection of single-electron tunneling
• Single-Spin Relaxation in a Synthetic Spin-Orbit Field
• Optimized electrical control of a Si/SiGe spin qubit in the presence of an induced frequency shift
• Coherent electron-spin-resonance manipulation of three individual spins in a triple quantum dot
• Single-electron Spin Resonance in a Quadruple Quantum Dot
• Stabilization and manipulation of multispin states in quantum-dot time crystals with Heisenberg interactions

Cited by in corpus (43)

• Semiconductor Spin Qubits
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• Microwaves in Quantum Computing
• Coherent transfer of quantum information in silicon using resonant SWAP gates
• 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
• Simultaneous single-qubit driving of semiconductor spin qubits at the fault-tolerant threshold
• Deterministic generation of large-scale entangled photonic cluster state from interacting solid state emitters
• Resonantly driven singlet-triplet spin qubit in silicon
• Blueprint of a scalable spin qubit shuttle device for coherent mid-range qubit transfer in disordered Si/SiGe/SiO${}_2$
• High fidelity state preparation, quantum control, and readout of an isotopically enriched silicon spin qubit
• Electric-field control and noise protection of the flopping-mode spin qubit
• Computer-automated tuning procedures for semiconductor quantum dot arrays
• Simultaneous Operations in a Two-Dimensional Array of Singlet-Triplet Qubits
• Protocol for a resonantly-driven three-qubit Toffoli gate with silicon spin qubits
• Coherent multi-spin exchange coupling in a quantum-dot spin chain
• Signatures of discrete time-crystallinity in transport through an open Fermionic chain
• Controlling Synthetic Spin-Orbit Coupling in a Silicon Quantum Dot with Magnetic Field
• Floquet-Enhanced Spin Swaps
• Coherent transport of spin by adiabatic passage in quantum dot arrays
• Emergence and Dynamical Stability of Charge Time-Crystal in a Current-Carrying Quantum Dot Simulator
• Jellybean quantum dots in silicon for qubit coupling and on-chip quantum chemistry
• Flopping-mode spin qubit in a Si-MOS quantum dot
• Cryogen-free scanning gate microscope for the characterization of Si/Si${}_{0.7}$Ge${}_{0.3}$ quantum devices at milli-Kelvin temperatures
• Programmable two-qubit gates in capacitively coupled flopping-mode spin qubits
• Highly tunable quadruple quantum dot in a narrow bandgap semiconductor InAs nanowire
• Spin-Valley Qubit Dynamics In Exchange Coupled Silicon Quantum Dots
• Robust energy selective tunneling readout of singlet triplet qubits under large magnetic field gradient
• Protecting Quantum Information in Quantum Dot Spin Chains by Driving Exchange Interactions Periodically
• Interplay of exchange and superexchange in triple quantum dots
• Discrete time crystal in the gradient field Heisenberg model
• Valley-Free Silicon Fins Caused by Shear Strain
• Measurement of tunnel coupling in a Si double quantum dot based on charge sensing
• Compressed gate characterization for quantum devices with time-correlated noise
• Hybrid Exchange Measurement-Based Qubit Operations in Semiconductor Double Quantum Dot Qubits
• Annual-modulation fingerprint of the axion wind induced sideband triplet in quantum dot spin qubit sensors
• Thermal Uhlmann phase in a locally driven two-spin system
• Protecting coherence from the environment via Stark many-body localization in a Quantum-Dot Simulator
• Universal control of superexchange in linear triple quantum dots with an empty mediator
• Resonator-mediated quantum gate between distant charge qubits
• Exact diagonalization study of double quantum dots in parallel geometry in zero-bandwidth limit
• Micromagnet-free operation of electron spin qubits in Si/Si${}_{1-x}$Ge${}_x$ vertical double quantum dots
• Realizable time crystal of four silicon quantum dot qubits