Measuring nuclear spin qubits by qudit-enhanced spectroscopy in Silicon Carbide

Abstract

Nuclear spins with hyperfine coupling to single electron spins are highly valuable quantum bits. In this work we probe and characterise the particularly rich nuclear spin environment around single silicon vacancy color-centers (V2) in 4H-SiC. By using the electron spin-3/2 qudit as a 4 level sensor, we identify several groups of ${}^{29}$Si and ${}^{13}$C nuclear spins through their hyperfine interaction. We extract the major components of their hyperfine coupling via optical detected nuclear resonance, and assign them to shell groups in the crystal via the DFT simulations. We utilise the ground state level anti-crossing of the electron spin for dynamic nuclear polarization and achieve a nuclear spin polarization of up to $98\pm 6\%$. We show that this scheme can be used to detect the nuclear magnetic resonance signal of individual spins and demonstrate their coherent control. Our work provides a detailed set of parameters for future use of SiC as a multi-qubit memory and quantum computing platform.

9 pages, 4 figures, 1 SM

References in corpus (17)

• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
• Precision tomography of a three-qubit donor quantum processor in silicon
• Fault-tolerant operation of a logical qubit in a diamond quantum processor
• Robust multi-qubit quantum network node with integrated error detection
• Observation of a many-body-localized discrete time crystal with a programmable spin-based quantum simulator
• Nanofabricated and integrated colour centres in silicon carbide with high-coherence spin-optical properties
• Optical polarization of nuclear spins in silicon carbide
• Nuclear spin polarization and control in a van der Waals material
• Identification of Si-vacancy related room temperature qubits in 4H silicon carbide
• Spin-controlled generation of indistinguishable and distinguishable photons from silicon vacancy centres in silicon carbide
• Electron Spin Decoherence in Silicon Carbide Nuclear Spin Bath
• Coherent Control of a Single Silicon-29 Nuclear Spin Qubit
• Quantum Fourier transform for quantum sensing
• Narrow inhomogeneous distribution of spin-active emitters in silicon carbide
• Electron nuclear interactions and electronic structure of spin 3/2 color centers in silicon carbide: A high-field pulse EPR and ENDOR study
• The Transition from Quantum to Classical in weak measurements and reconstruction of Quantum Correlation

Cited by in corpus (3)

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• Nuclear spin polarization in silicon carbide at room temperature in the Earth's magnetic field
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