A diverse set of two-qubit gates for spin qubits in semiconductor quantum dots
arXiv:2404.18689 · doi:10.1103/PhysRevApplied.23.024065
Abstract
To realize large-scale quantum information processes, an ideal scheme for two-qubit operations should enable diverse operations with given hardware and physical interaction. However, for spin qubits in semiconductor quantum dots, the common two-qubit operations, including CPhase gates, SWAP gates, and CROT gates, are realized with distinct parameter regions and control waveforms, posing challenges for their simultaneous implementation. Here, taking advantage of the inherent Heisenberg interaction between spin qubits, we propose and verify a fast composite two-qubit gate scheme to extend the available two-qubit gate types as well as reduce the requirements for device properties. Apart from the formerly proposed CPhase (controlled-phase) gates and SWAP gates, theoretical results indicate that the iSWAP-family gate and Fermionic simulation (fSim) gate set are additionally available for spin qubits. Meanwhile, our gate scheme limits the parameter requirements of all essential two-qubit gates to a common J~ΔE_Z region, facilitate the simultaneous realization of them. Furthermore, we present the preliminary experimental demonstration of the composite gate scheme, observing excellent match between the measured and simulated results. With this versatile composite gate scheme, broad-spectrum two-qubit operations allow us to efficiently utilize the hardware and the underlying physics resources, helping accelerate and broaden the scope of the upcoming noise intermediate-scale quantum (NISQ) computing.
23 pages, 6 figures,
References in corpus (42)
- Supplementary information for "Quantum supremacy using a programmable superconducting processor"
- Quantum Computation with Quantum Dots
- The Physical Implementation of Quantum Computation
- Characterizing Quantum Supremacy in Near-Term Devices
- Observation of a Discrete Time Crystal
- 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
- Extending the computational reach of a noisy superconducting quantum processor
- Quantum CNOT Gate for Spins in Silicon
- Electrical control of a long-lived spin qubit in a Si/SiGe quantum dot
- Digitized adiabatic quantum computing with a superconducting circuit
- Quantum Simulation of Electronic Structure with Linear Depth and Connectivity
- A Dissipatively Stabilized Mott Insulator of Photons
- Quantum simulation of a Fermi-Hubbard model using a semiconductor quantum dot array
- Two-qubit silicon quantum processor with operation fidelity exceeding 99%
- Demonstrating a Continuous Set of Two-qubit Gates for Near-term Quantum Algorithms
- Reduced sensitivity to charge noise in semiconductor spin qubits via symmetric operation
- Dynamically Error-Corrected Gates for Universal Quantum Computation
- Composite pulses for robust universal control of singlet-triplet qubits
- Quantum error correction with silicon spin qubits
- Realisation of a programmable two-qubit quantum processor
- Universal logic with encoded spin qubits in silicon
- Nagaoka ferromagnetism observed in a quantum dot plaquette
- High-fidelity quantum gates in Si/SiGe double quantum dots
- Dynamical Quantum Error Correction of Unitary Operations with Bounded Controls
- Implementation of the XY interaction family with calibration of a single pulse
- Coherent spin state transfer via Heisenberg exchange
- Noise-resistant control for a spin qubit array
- Robust control of quantum gates via sequential convex programming
- Efficient C-Phase gate for single-spin qubits in quantum dots
- Robust quantum gates for singlet-triplet spin qubits using composite pulses
- High-fidelity operation and algorithmic initialisation of spin qubits above one kelvin
- Operating semiconductor quantum processors with hopping spins
- Automated Synthesis of Dynamically Corrected Quantum Gates
- Quantum simulation of antiferromagnetic Heisenberg chain with gate-defined quantum dots
- Probing resonating valence bonds on a programmable germanium quantum simulator
- Bell-state tomography in a silicon many-electron artificial molecule
- Controlling Synthetic Spin-Orbit Coupling in a Silicon Quantum Dot with Magnetic Field
- Flopping-mode spin qubit in a Si-MOS quantum dot
- Long-range electron-electron interactions in quantum dot systems and applications in quantum chemistry
- Entangling gates on degenerate spin qubits dressed by a global field