Efficient quantum gates for individual nuclear spin qubits by indirect control

Abstract

Hybrid quantum registers, such as electron-nuclear spin systems, have emerged as promising hardware for implementing quantum information and computing protocols in scalable systems. Nevertheless, the coherent control of such systems still faces challenges. Particularly, the lower gyromagnetic ratios of the nuclear spins cause them to respond slowly to control fields, resulting in gate times that are generally longer than the coherence time of the electron spin. Here, we demonstrate a scheme for circumventing this problem by indirect control: We apply a small number of short pulses only to the electron spin and let the full system undergo free evolution under the hyperfine coupling between the pulses. Using this scheme, we realize robust quantum gates in an electron-nuclear spin system, including a Hadamard gate on the nuclear spin and a controlled-NOT gate with the nuclear spin as the target qubit. The durations of these gates are shorter than the electron spin coherence time, and thus additional operations to extend the system coherence time are not needed. Our demonstration serves as a proof of concept for achieving efficient coherent control of electron-nuclear spin systems, such as NV centers in diamond. Our scheme is still applicable when the nuclear spins are only weakly coupled to the electron spin.

arXiv commentSupplementary material added; Accepted for publication in PRL

References in corpus (23)

• Observation of coherent oscillation of a single nuclear spin and realization of a two-qubit conditional quantum gate
• Keeping a Quantum Bit Alive by Optimized $\pi$-Pulse Sequences
• Room temperature coherent control of coupled single spins in solid
• A 10-qubit solid-state spin register with quantum memory up to one minute
• Universal control and error correction in multi-qubit spin registers in diamond
• Decoherence-protected quantum gates for a hybrid solid-state spin register
• Distributed Quantum Computation Based-on Small Quantum Registers
• Detection and control of individual nuclear spins using a weakly coupled electron spin
• Ab initio supercell calculations on nitrogen-vacancy center in diamond: its electronic structure and hyperfine tensors
• Coherence of single spins coupled to a nuclear spin bath of varying density
• Electron spin decoherence of single Nitrogen-Vacancy defects in diamond
• Protected quantum computing: Interleaving gate operations with dynamical decoupling sequences
• Universal Control of Nuclear Spins Via Anisotropic Hyperfine Interactions
• Coherence and control of quantum registers based on electronic spin in a nuclear spin bath
• Coherent control of two nuclear spins using the anisotropic hyperfine interaction
• Switched Control of Electron Nuclear Spin Systems
• Room-temperature high-speed nuclear-spin quantum memory in diamond
• Experimental protection of 2-qubit quantum gates against environmental noise by dynamical decoupling
• Characterization of hyperfine interaction between an NV electron spin and a first-shell 13C nuclear spin in diamond
• Room-temperature storage of quantum entanglement using decoherence-free subspace in a solid-state spin system
• Improved indirect control of nuclear spins in diamond NV centers
• Bloch-Siegert Shift in a Hybrid Quantum Register: Quantification and Compensation
• Pulse sequences for controlled 2- and 3-qubit gates in a hybrid quantum register

Cited by in corpus (27)

• Efficient Implementation of a Quantum Algorithm in a Single Nitrogen Vacancy Center of Diamond
• Room-temperature control and electrical readout of individual nitrogen-vacancy nuclear spins
• Probing the coherence of solid-state qubits at avoided crossings
• Coherence and entanglement of inherently long-lived spin pairs in diamond
• Experimental quantum pattern recognition in IBMQ and diamond NVs
• Shallow Silicon Vacancy Centers with lifetime-limited optical linewidths in Diamond Nanostructures
• Nuclear Spin Quantum Memory in Silicon Carbide
• Universal quantum computing using electro-nuclear wavefunctions of rare-earth ions
• Robust population inversion in three-level systems by composite pulses
• Hyperfine Structure of Transition Metal Defects in SiC
• Dynamical quantum phase transitions in a noisy lattice gauge theory
• Fast Quantum State Tomography in the Nitrogen Vacancy Center of Diamond
• Fast coherent control of an NV- spin ensemble using a KTaO3 dielectric resonator at cryogenic temperatures
• Towards the speed limit of high fidelity 2-qubit gates
• Calculation of the energies of the multideterminant states of the nitrogen vacancy center in diamond with quantum Monte Carlo
• Decoherence-free quantum register of nuclear spins in diamond
• Limits to Quantum Gate Fidelity from Near-Field Thermal and Vacuum Fluctuations
• Performance of quantum registers in diamond in the presence of spin impurities
• Coupling function from bath density of states
• Coherent Control of a Long-Lived Nuclear Memory Spin in a Germanium-Vacancy Multi-Qubit Node
• Level anti-crossings of an NV center in diamond: Decoherence-free subspaces and 3D sensors of microwave magnetic fields
• Indirect Control of the ${}^{29}\mathrm{Si}{\mathrm{V}}^{-}$ Nuclear Spin in Diamond
• Ancilla mediated qubit readout and heralded entanglement between rare-earth dopant ions in crystals
• Selective nuclear-spin interaction based on a dissipatively stabilized nitrogen-vacancy center
• PULSEE: A software for the quantum simulation of an extensive set of magnetic resonance observables
• Rapid transform optimisation strategy for decoherence-protected quantum register in diamond
• Four-order power reduction in nanoscale electron-nuclear double resonance with a nitrogen-vacancy center in diamond