Excitation and coherent control of spin qudit modes with sub-MHz spectral resolution

Abstract

Quantum bit or qubit is a two-level system, which builds the foundation for quantum computation, simulation, communication and sensing. Quantum states of higher dimension, i.e., qutrits (D = 3) and especially qudits (D = 4 or higher), offer significant advantages. Particularly, they can provide noise-resistant quantum cryptography, simplify quantum logic and improve quantum metrology. Flying and solid-state qudits have been implemented on the basis of photonic chips and superconducting circuits, respectively. However, there is still a lack of room-temperature qudits with long coherence time and high spectral resolution. The silicon vacancy centers in silicon carbide (SiC) with spin S = 3/2 are quite promising in this respect, but until now they were treated as a canonical qubit system. Here, we apply a two-frequency protocol to excite and image multiple qudit modes in a SiC spin ensemble under ambient conditions. Strikingly, their spectral width is about one order of magnitude narrower than the inhomogeneous broadening of the corresponding spin resonance. By applying Ramsey interferometry to these spin qudits, we achieve a spectral selectivity of 600 kHz and a spectral resolution of 30 kHz. As a practical consequence, we demonstrate absolute DC magnetometry insensitive to thermal noise and strain fluctuations.

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• Practical trapped-ion protocols for universal qudit-based quantum computing
• Room temperature coherent manipulation of single-spin qubits in silicon carbide with a high readout contrast
• Coherent Manipulation with Resonant Excitation and Single Emitter Creation of Nitrogen Vacancy Centers in 4H Silicon Carbide
• Robust and Efficient High-dimensional Quantum State Tomography
• Influence of irradiation on defect spin coherence in silicon carbide
• Dimensional enhancements in a quantum battery with imperfections
• Quantum Error Correction of Qudits Beyond Break-even
• Solving correlation clustering with QAOA and a Rydberg qudit system: a full-stack approach
• nanoTesla magnetometry with the silicon vacancy in silicon carbide
• Local vibrational modes of Si vacancy spin qubits in SiC
• Quantum Optimal Control of Nuclear Spin Qudecimals in ${}^{87}\text{Sr}$
• Anisotropic Spin-Acoustic Resonance in Silicon Carbide at Room Temperature
• Dynamic polarization of electron spins interacting with nuclei in semiconductor nanostructures
• Spin-alignment noise in atomic vapor
• Experimental characterization of spin-3/2 silicon vacancy centers in 6H-SiC
• Optically detected spin-mechanical resonance in silicon carbide membranes
• Stress-controlled zero-field spin splitting in silicon carbide
• Stress distribution at the AlN/SiC heterointerface probed by Raman spectroscopy
• Uncomputability and complexity of quantum control
• Long-Lived Spin-Polarized Intermolecular Exciplex States in Thermally Activated Delayed Fluorescence-Based Organic Light-Emitting Diodes
• Characterization of single shallow silicon-vacancy centers in 4H-SiC
• Multi-photon multi-quantum transitions in the spin-3/2 silicon-vacancy centers of SiC
• Spin noise at electron paramagnetic resonance
• Optical spin initialization of spin-3/2 silicon vacancy centers in 6H-SiC at room temperature
• Relaxation dynamics of spin 3/2 silicon vacancies in 4H-Silicon carbide
• Nonlinear spectroscopy of high-spin fluctuations
• Optical Spin Initialization of Nitrogen Vacancy Centers in a 28Si-Enriched 6H-SiC Crystal for Quantum Technologies
• Low-field microwave-free sensors using dipolar spin relaxation of quartet spin states in silicon carbide
• Solutions to the constant Yang-Baxter equation in all dimensions
• Theory of Field-Angle-Resolved Magnetoacoustic Resonance in Spin-Triplet Systems for Application to Nitrogen-Vacancy Centers in Diamond
• Efficient preparation of the AKLT State with Measurement-based Imaginary Time Evolution
• Theory of Spin-Acoustic Resonance for Spin-3/2 Si Vacancy with $C_{3v}$ Site Symmetry in Silicon Carbide
• Theory of Magnetoacoustic Resonance to Probe Multipole Effects Due to a Crystal Field Quartet
• Nuclear spin polarization in silicon carbide at room temperature in the Earth's magnetic field
• Tradeoff between noise and banding in a quantum adder with qudits
• Dynamical Reorientation of Spin Multipoles in Silicon Carbide by Transverse Magnetic Fields
• Acoustically induced coherent spin trapping
• Novel Magnetoacoustic Resonance Technique for Exploring Hidden Quadrupoles in a Crystal Field Quartet
• Creating two-qudit maximally entangled quantum link through bulk