Single-Shot Readout of a Nuclear Spin Weakly Coupled to a Nitrogen-Vacancy Center

Abstract

Single-shot readout of qubits is required for scalable quantum computing. Nuclear spins are superb quantum memories due to their long coherence times but are difficult to be read out in single shot due to their weak interaction with probes. Here we demonstrate single-shot readout of a weakly coupled ${}^{13}$C nuclear spin, which is unresolvable in traditional protocols. We use dynamical decoupling pulse sequences to selectively enhance the entanglement between the nuclear spin and a nitrogen-vacancy center electron spin, tuning the weak measurement of the nuclear spin to a strong, projective one. A nuclear spin coupled to the NV center with strength 330 kHz is read out in 200 ms with fidelity 95.5\%. This work provides a general protocol for single-shot readout of weakly coupled qubits and therefore largely extends the range of physical systems for scalable quantum computing.

5 pages, 4 figures

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Cited by in corpus (37)

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• Single-molecule Scale Magnetic Resonance Spectroscopy using Nitrogen-Vacancy Centers in Diamond
• Noisy intermediate-scale quantum computers
• High-resolution spectroscopy of single nuclear spins via sequential weak measurements
• Quantum Fisher information measurement and verification of the quantum Cramér-Rao bound in a solid-state qubit
• Coherence and entanglement of inherently long-lived spin pairs in diamond
• Entanglement of dark electron-nuclear spin defects in diamond
• Path-Independent Quantum Gates with Noisy Ancilla
• Proposal to Test Quantum Wave-Particle Superposition on Massive Mechanical Resonators
• Exact quantum dynamics of XXZ central spin problems
• Deep learning enhanced individual nuclear-spin detection
• Phase transitions in sequential weak measurements
• Quantum spectroscopy of single spins assisted by a classical clock
• Characterizing temperature and strain variations with qubit ensembles for their robust coherence protection
• Proposal for room-temperature quantum repeaters with nitrogen-vacancy centers and optomechanics
• Single-Shot Readout and Weak Measurement of a Tin-Vacancy Qubit in Diamond
• Pulsed Quantum-State Reconstruction of Dark Systems
• Quantum phase transition in XXZ central spin model
• Exact dynamics of the homogeneous two-qubit $XXZ$ central spin model with the spin bath prepared in superpositions of symmetric Dicke states
• Sequential generalized measurements: Asymptotics, typicality and emergent projective measurements
• Theory of Metastability in Discrete-Time Open Quantum Dynamics
• Algebraic structure of path-independent quantum control
• How coherence measurements of a qubit steer its quantum environment
• Algorithmic decomposition for efficient multiple nuclear spin detection in diamond
• Direct Readout of Nitrogen-Vacancy Hybrid-Spin Quantum Register in Diamond by Photon Arrival Time Analysis
• Nuclear spin relaxation in solid state defect quantum bits via electron-phonon coupling in their optical excited state
• Phase Diagram of the Dynamics of a Precessing Qubit under Quantum Measurement
• Room-temperature Composite-pulses for Robust Diamond Magnetometry
• Fast coherent control of nitrogen-14 spins associated with nitrogen-vacancy centers in diamonds using dynamical decoupling
• Channel-based framework for phase esimation of multiple eigenvalues
• Four-order power reduction in nanoscale electron-nuclear double resonance with a nitrogen-vacancy center in diamond
• Weak measurement of quantum superposition states in graphene
• Multi-shot readout error benchmark of the nitrogen-vacancy center's electronic qubit
• Quantum Sensing by Using STIRAP with Dressed States Driving
• Real-Time Charge Initialization of Diamond Nitrogen-Vacancy Centers for Enhanced Spin Readout
• Overcoming frequency resolution limits using a solid-state spin quantum sensor