Efficient C-Phase gate for single-spin qubits in quantum dots

Abstract

Two-qubit interactions are at the heart of quantum information processing. For single-spin qubits in semiconductor quantum dots, the exchange gate has always been considered the natural two-qubit gate. The recent integration of magnetic field or g-factor gradients in coupled quantum dot systems allows for a one-step, robust realization of the controlled phase (C-Phase) gate instead. We analyze the C-Phase gate durations and fidelities that can be obtained under realistic conditions, including the effects of charge and nuclear field fluctuations, and find gate error probabilities of below 10-4, possibly allowing fault-tolerant quantum computation.

5 pages, 3 figures

References in corpus (9)

• Single-shot read-out of an individual electron spin in a quantum dot
• Driven coherent oscillations of a single electron spin in a quantum dot
• Spin-orbit qubit in a semiconductor nanowire
• Electrically driven single electron spin resonance in a slanting Zeeman field
• Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
• Enhancing the Coherence of a Spin Qubit by Operating it as a Feedback Loop That Controls its Nuclear Spin Bath
• Hyperfine-mediated gate-driven electron spin resonance
• Exchange-controlled single-electron-spin rotations in quantum dots
• Double Occupancy Errors in Quantum Computing Operations: Corrections to Adiabaticity

Cited by in corpus (60)

• A Two Qubit Logic Gate in Silicon
• A programmable two-qubit quantum processor in silicon
• Semiconductor Spin Qubits
• Quantum CNOT Gate for Spins in Silicon
• Computing with spin qubits at the surface code error threshold
• Two-qubit silicon quantum processor with operation fidelity exceeding 99%
• CMOS-based cryogenic control of silicon quantum circuits
• A fault-tolerant addressable spin qubit in a natural silicon quantum dot
• Fast spin-orbit qubit in an indium antimonide nanowire
• Semiconductor Quantum Computation
• Benchmarking Gate Fidelities in a Si/SiGe Two-Qubit Device
• The impact of classical control electronics on qubit fidelity
• High-fidelity quantum gates in Si/SiGe double quantum dots
• Quantum tomography of an entangled three-spin state in silicon
• Coherent transfer of quantum information in silicon using resonant SWAP gates
• Optically controlled phase gate and teleportation of a controlled-NOT gate for spin qubits in quantum dot-microcavity coupled system
• Robust micro-magnet design for fast electrical manipulations of single spins in quantum dots
• Repetitive single electron spin readout in silicon
• The SpinBus Architecture: Scaling Spin Qubits with Electron Shuttling
• A logical qubit in a linear array of semiconductor quantum dots
• Robust two-qubit gates for donors in silicon controlled by hyperfine interactions
• Two-Qubit Gates for Resonant Exchange Qubits
• Quantum Computation Protocol for Dressed Spins in a Global Field
• Protocol for a resonantly-driven three-qubit Toffoli gate with silicon spin qubits
• Spatial Noise Correlations in a Si/SiGe Two-Qubit Device from Bell State Coherences
• 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 %
• Bell-state tomography in a silicon many-electron artificial molecule
• Spin decoherence in a two-qubit CPHASE gate: the critical role of tunneling noise
• Theory of Spin Relaxation in Two-Electron Lateral Coupled Si/SiGe Quantum Dots
• Coherent transport of spin by adiabatic passage in quantum dot arrays
• Quantum error correction in crossbar architectures
• Capacitively coupled singlet-triplet qubits in the double charge resonant regime
• Pulse sequence designed for robust C-phase gates in SiMOS and Si/SiGe double quantum dots
• Enhancing the dipolar coupling of a $S$-$T_0$ qubit with a transverse sweet spot
• High-fidelity and robust two-qubit gates for quantum-dot spin qubits in silicon
• A Silicon Surface Code Architecture Resilient Against Leakage Errors
• Transversal Diagonal Logical Operators for Stabiliser Codes
• Low-noise conditional operation of singlet-triplet coupled quantum dot qubits
• A Multiscale Simulation Approach for Germanium-Hole-Based Quantum Processor
• Robust implementation of quantum gates despite always-on exchange coupling in silicon double quantum dots
• Limits to Quantum Gate Fidelity from Near-Field Thermal and Vacuum Fluctuations
• Spin-Orbit Interaction Enabled High-Fidelity Two-Qubit Gates
• Entangling gates on degenerate spin qubits dressed by a global field
• Compressed gate characterization for quantum devices with time-correlated noise
• Probing two-qubit capacitive interactions beyond bilinear regime using dual Hamiltonian parameter estimations
• Neural-network-designed three-qubit gates robust against charge noise and crosstalk in silicon
• A spinless spin qubit
• Computational Assessment of Silicon Quantum Gate Based on Detuning Mechanism for Quantum Computing
• Proposal for a cavity-induced measurement of the exchange coupling in quantum dots
• Wavelet correlation noise analysis for qubit operation variable time series
• Multi-qubit DC gates over an inhomogeneous array of quantum dots
• A diverse set of two-qubit gates for spin qubits in semiconductor quantum dots
• Pursuing high-fidelity control of spin qubits in natural Si/SiGe quantum dot
• Interplay of Zeeman Splitting and Tunnel Coupling in Coherent Spin Qubit Shuttling
• Ab initio modelling of quantum dot qubits: Coupling, gate dynamics and robustness versus charge noise
• Performance Assessment of Resonantly Driven Silicon Two-Qubit Quantum Gate
• Four electron spin qubits with exchange interaction
• Decoherence and fidelity enhancement during shuttling of entangled spin qubits
• Engineering a C-Phase quantum gate: optical design and experimental realization