High-Fidelity Optical Readout of a Nuclear-Spin Qubit in Silicon Carbide

Erik Hesselmeier, Pierre Kuna, Wolfgang Knolle, Florian Kaiser, Nguyen Tien Son, Misagh Ghezellou, Jawad Ul-Hassan, Vadim Vorobyov, and Jörg Wrachtrup

Phys. Rev. Lett. 132, 180804 – Published 2 May 2024

Abstract

Quantum state readout is a key requirement for a successful qubit platform. In this work, we demonstrate a high-fidelity quantum state readout of a $V 2$ center nuclear spin based on a repetitive readout technique. We demonstrate up to 99.5% readout fidelity and 99% for state preparation. Using this efficient readout, we initialize the nuclear spin by measurement and demonstrate its Rabi and Ramsey nutation. Finally, we use the nuclear spin as a long-lived memory for quantum sensing application of a weakly coupled diatomic nuclear-spin bath.

Received 8 January 2024
Accepted 10 April 2024

DOI:https://doi.org/10.1103/PhysRevLett.132.180804

Physics Subject Headings (PhySH)

Color centers Quantum communication, protocols & technology Quantum information with solid state qubits Quantum memories

Coherent control Electron nuclear double resonance Electron paramagnetic resonance Nuclear spin resonance Optically detected magnetic resonance Photon counting

Quantum Information, Science & TechnologyAtomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Erik Hesselmeier ^1,*, Pierre Kuna ^1,*, Wolfgang Knolle², Florian Kaiser^3,4, Nguyen Tien Son⁵, Misagh Ghezellou ⁵, Jawad Ul-Hassan⁵, Vadim Vorobyov ^1,†, and Jörg Wrachtrup^1,6

¹3rd Institute of Physics, IQST, and Research Center SCoPE, University of Stuttgart, Stuttgart, Germany
²Department of Sensoric Surfaces and Functional Interfaces, Leibniz-Institute of Surface Engineering (IOM), Leipzig, Germany
³Materials Research and Technology (MRT) Department, Luxembourg Institute of Science and Technology (LIST), 4422 Belvaux, Luxembourg
⁴University of Luxembourg, 41 rue du Brill, L-4422 Belvaux, Luxembourg
⁵Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
⁶Max Planck Institute for solid state physics, Stuttgart, Germany

^*These authors contributed equally to this letter.
^†v.vorobyov@pi3.uni-stuttgart.de

Single-Shot Readout of a Nuclear Spin in Silicon Carbide

Xiao-Yi Lai, Ren-Zhou Fang, Tao Li, Ren-Zhu Su, Jia Huang, Hao Li, Li-Xing You, Xiao-Hui Bao, and Jian-Wei Pan

Phys. Rev. Lett. 132, 180803 (2024)

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Vol. 132, Iss. 18 — 3 May 2024

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