High-fidelity control of a ${}^{13}$C nuclear spin coupled to a tin-vacancy center in diamond

Abstract

Nuclear spins near group-IV defects in diamond are promising candidates for quantum memories in quantum network applications. Here, we demonstrate high-fidelity control of a single ${}^{13}$C nuclear spin coupled to a tin-vacancy (SnV) center in diamond. We perform a combination of optical and microwave pumping to achieve initialization into a combined electro-nuclear spin state with a fidelity of $99.74(3)\%$. Harnessing a superconducting waveguide for radio-frequency driving, we demonstrate precise nuclear spin control: Ramsey measurements reveal a coherence time of $T_2^{\ast }=1.5(1)$milliseconds, and we use dynamical decoupling to extend it to $1.35(3)$seconds. We perform randomized benchmarking, yielding a single-qubit gate fidelity of $99.92(1)\%$. This demonstrates a coherent spin-photon system with promising properties for quantum network nodes.

Main: 5 pages, 3 figures; Supplement: 10 pages, 10 figures, 2 tables

References in corpus (19)

• The Quantum Internet
• Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout
• Robust multi-qubit quantum network node with integrated error detection
• Spectroscopic Investigations of Negatively Charged Tin-Vacancy Centres in Diamond
• Comparison of dynamical decoupling protocols for a nitrogen-vacancy center in diamond
• Initialization and Readout of Nuclear Spins via negatively charged Silicon-Vacancy Center in Diamond
• Heterodyne Sensing of Microwaves with a Quantum Sensor
• Coherence of a charge stabilised tin-vacancy spin in diamond
• Microwave Spin Control of a Tin-Vacancy Qubit in Diamond
• A coherent spin-photon interface with waveguide induced cycling transitions
• Germanium Vacancy in Diamond Quantum Memory Exceeding 20 ms
• Coherent Coupling of a Diamond Tin-Vacancy Center to a Tunable Open Microcavity
• Calculating the Hyperfine Tensors for Group-IV Impurity-Vacancy Centers in Diamond: A Hybrid Density-Functional Theory Approach
• Single-Shot Readout and Weak Measurement of a Tin-Vacancy Qubit in Diamond
• Heralded initialization of charge state and optical transition frequency of diamond tin-vacancy centers
• Hyperfine spectroscopy and fast, all-optical arbitrary state initialization and readout of a single, ten-level ${}^{73}$Ge vacancy nuclear spin qudit in diamond
• Coherent Control of a Long-Lived Nuclear Memory Spin in a Germanium-Vacancy Multi-Qubit Node
• Efficient Microwave Spin Control of Negatively Charged Group-IV Color Centers in Diamond
• Control of solid-state nuclear spin qubits using an electron spin-1/2

Cited by in corpus (1)

• Above-Unity Coherent Cooperativity of Tin-Vacancy Centers in Diamond Photonic Crystal Cavities