Entanglement and control of single quantum memories in isotopically engineered silicon carbide

Abstract

Nuclear spins in the solid state are both a cause of decoherence and a valuable resource for spin qubits. In this work, we demonstrate control of isolated 29Si nuclear spins in silicon carbide (SiC) to create an entangled state between an optically active divacancy spin and a strongly coupled nuclear register. We then show how isotopic engineering of SiC unlocks control of single weakly coupled nuclear spins and present an ab initio method to predict the optimal isotopic fraction which maximizes the number of usable nuclear memories. We bolster these results by reporting high-fidelity electron spin control (F=99.984(1)%), alongside extended coherence times (T2=2.3 ms, T2DD>14.5 ms), and a >40 fold increase in dephasing time (T2*) from isotopic purification. Overall, this work underlines the importance of controlling the nuclear environment in solid-state systems and provides milestone demonstrations that link single photon emitters with nuclear memories in an industrially scalable material.

arXiv comment25 pages, 5 figures

References in corpus (33)

• Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
• Quantum Computing with Very Noisy Devices
• An addressable quantum dot qubit with fault-tolerant control fidelity
• A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
• Observation of coherent oscillation of a single nuclear spin and realization of a two-qubit conditional quantum gate
• Coherent control of single spins in silicon carbide at room temperature
• Quantum error correction in a solid-state hybrid spin register
• Roads towards fault-tolerant universal quantum computation
• Isolated electron spins in silicon carbide with millisecond-coherence times
• Universal control and error correction in multi-qubit spin registers in diamond
• Entanglement Distillation between Solid-State Quantum Network Nodes
• Detection and control of individual nuclear spins using a weakly coupled electron spin
• High-fidelity spin and optical control of single silicon vacancy centres in silicon carbide
• Atomic-scale imaging of a 27-nuclear-spin cluster using a single-spin quantum sensor
• Electrical and optical control of single spins integrated in scalable semiconductor devices
• Experimental fault-tolerant universal quantum gates with solid-state spins under ambient conditions
• Probing spin-phonon interactions in silicon carbide with Gaussian acoustics
• Quantum decoherence dynamics of divacancy spins in silicon carbide
• Quantum many-body theory of qubit decoherence in a finite-size spin bath
• Silicon qubit fidelities approaching incoherent noise limits via pulse engineering
• Demonstration of entanglement-by-measurement of solid state qubits
• Optimized quantum sensing with a single electron spin using real-time adaptive measurements
• Purcell enhancement of a single silicon carbide color center with coherent spin control
• Optical polarization of nuclear spins in silicon carbide
• Universal coherence protection in a solid-state spin qubit
• Competition between electric field and magnetic field noise in the decoherence of a single spin in diamond
• Quantum Decoherence of the Central Spin in a Sparse System of Dipolar Coupled Spins
• Electrically driven optical interferometry with spins in silicon carbide
• Dephasing mechanisms of diamond-based nuclear-spin memories for quantum networks
• Revealing the emergence of classicality in nitrogen-vacancy centers
• Decoherence of nuclear spins in the "frozen core" of an electron spin
• Precise high-fidelity electron-nuclear spin entangling gates in NV centers via hybrid dynamical decoupling sequences
• Nuclear spin decoherence of neutral ${}^{31}$P donors in silicon: Effect of environmental ${}^{29}$Si nuclei

Cited by in corpus (72)

• Quantum repeaters: From quantum networks to the quantum internet
• Semiconductor Qubits In Practice
• Quantum networks based on color centers in diamond
• Precision tomography of a three-qubit donor quantum processor in silicon
• Fault-tolerant operation of a logical qubit in a diamond quantum processor
• Integrated quantum photonics with silicon carbide: challenges and prospects
• Nanofabricated and integrated colour centres in silicon carbide with high-coherence spin-optical properties
• Universal coherence protection in a solid-state spin qubit
• Nuclear spin-wave quantum register for a solid state qubit
• Nanomaterials for Quantum Information Science and Engineering
• Room temperature coherent manipulation of single-spin qubits in silicon carbide with a high readout contrast
• Materials challenges for quantum technologies based on color centers in diamond
• Resonant Excitation and Purcell Enhancement of Coherent Nitrogen-Vacancy Centers Coupled to a Fabry-Pérot Micro-Cavity
• Diamond Integrated Quantum Photonics: A Review
• Probing the coherence of solid-state qubits at avoided crossings
• Quantum sensing of a coherent single spin excitation in a nuclear ensemble
• Microwave Spin Control of a Tin-Vacancy Qubit in Diamond
• Mapping a 50-spin-qubit network through correlated sensing
• Isotope engineering for spin defects in van der Waals materials
• Quantum Information Processing With Integrated Silicon Carbide Photonics
• Experimental Generation of Spin-Photon Entanglement in Silicon Carbide
• Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide
• Witnessing quantum correlations in a nuclear ensemble via an electron spin qubit
• Multidimensional cluster states using a single spin-photon interface coupled strongly to an intrinsic nuclear register
• Temperature dependence of divacancy spin coherence in implanted silicon carbide
• Scalable quantum memory nodes using nuclear spins in Silicon Carbide
• Narrow inhomogeneous distribution of spin-active emitters in silicon carbide
• Single-Shot Readout of a Nuclear Spin in Silicon Carbide
• Donor-Acceptor Pairs in Wide-Bandgap Semiconductors for Quantum Technology Applications
• Substrate-controlled dynamics of spin qubits in low dimensional van-der-Waals materials
• Characterizing temperature and strain variations with qubit ensembles for their robust coherence protection
• Precise control of entanglement in multinuclear spin registers coupled to defects
• Room-Temperature entangled quantum processor on integrated semiconductor photonics platform
• Robust Nuclear Spin Polarization via Ground-State Level Anti-Crossing of Boron Vacancy Defects in Hexagonal Boron Nitride
• Optical and spin coherence of Er${}^{3+}$ in epitaxial CeO${}_2$ on silicon
• Predicting Phonon-Induced Spin Decoherence from First Principles: Colossal Spin Renormalization in Condensed Matter
• Decoherence of Nuclear Spins in the Proximity of Nitrogen Vacancy Centers in Diamond
• Laser writing and spin control of near infrared emitters in silicon carbide
• Characterization of single shallow silicon-vacancy centers in 4H-SiC
• Temperature dependent spin-phonon coupling of boron-vacancy centers in hexagonal boron nitride
• Adaptive, Continuous Entanglement Generation for Quantum Networks
• Observing hyperfine interactions of NV centers in diamond in an advanced quantum teaching lab
• Calculation of the energies of the multideterminant states of the nitrogen vacancy center in diamond with quantum Monte Carlo
• Scalable entanglement of nuclear spins mediated by electron exchange
• Quantum enhanced electric field mapping within semiconductor devices
• Suppression of the optical linewidth and spin decoherence of a quantum spin center in a $p$$-$$n$ diode
• Nuclear Spin Engineering for Quantum Information Science
• Error channels in quantum nondemolition measurements on spin systems
• Experimental test of high-dimensional quantum contextuality based on contextuality concentration
• Generation of genuine all-way entanglement in defect-nuclear spin systems through dynamical decoupling sequences
• Time-crystalline behavior in central-spin models with Heisenberg interactions
• Improved Electron-Nuclear Quantum Gates for Spin Sensing and Control
• High-Fidelity Entangling Gates for Electron and Nuclear Spin Qubits in Diamond
• Generalized scaling of spin qubit coherence in over 12,000 host materials
• Many-Body Entanglement in Solid-State Emitters
• Photo-luminescence properties of ion implanted Er3+-defects in 4H-SiCOI towards integrated quantum photonics
• Hilbert Space Fragmentation and Subspace Scar Time-Crystallinity in Driven Homogeneous Central-Spin Models
• Demonstration of a variational quantum eigensolver with a solid-state spin system under ambient conditions
• Quantum simulation of spin-1/2 XYZ model using solid-state spin centers
• Nuclear spin polarization in silicon carbide at room temperature in the Earth's magnetic field
• Stability and molecular pathways to the formation of spin defects in silicon carbide
• Trans-dimensional Hamiltonian model selection and parameter estimation from sparse, noisy data
• Numerically exact quantum dynamics with tensor networks: Predicting the decoherence of interacting spin systems
• Narrow magneto-optical transitions in Erbium implanted silicon carbide-on-insulator
• Phonon-induced two-axis spin squeezing with decoherence reduction in hybrid spin-optomechanical system
• High-throughput spin-bath characterization of spin-defects in semiconductors
• Quantifying electron-nuclear spin entanglement dynamics in central-spin systems using one-tangles
• Spin-photon Qubits for Scalable Quantum Network
• Identifying optimal magnetic field configurations for decoherence mitigation of boron vacancies in hexagonal boron nitride
• Extending Qubit Coherence Time via Hybrid Dynamical Decoupling
• Room-Temperature Storage of Entanglement in a Silicon Carbide Quantum Node
• Suppression of coherent errors during entangling operations in NV centers in diamond