ADAQ Database Leads to Experimental Verification of Telecom Defect Qubit

ORAL

Abstract

The exploration of point defects for quantum technology has gained momentum in recent years, particularly in the search for NV-like defects. Such defects are not as rare as one might think [1]. The online ADAQ database currently contains high-throughput results for approximately 50,000 defects in 80 host materials [2]. One of the predicted NV-like defects is the ClV in 4H-SiC [3]. By Cl implanting 4H-SiC, a point defect with spin-1 was discovered, exhibiting zero-field splitting around 1 GHz and bright optical emission in the C-band. These properties make this defect ideal for long-range quantum communication. The discovery was enabled by the high-throughput defect database ADAQ, and in this presentation, we explore the properties of this Cl-related defect.

*The author acknowledges funding from the Swedish Research Council (VR) Grant No. 2022-00276 and the Knut and Alice Wallenberg Foundation through the WBSQD2 project (Grant No. 2018.0071).

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Publication: [1] J. Davidsson; NV-like defects more common than four-leaf clovers: A perspective on high-throughput point defect data. Appl. Phys. Lett. 127 150501 (2025)
[2] https://defects.anyterial.se/
[3] O. Bulancea-Lindvall, J. Davidsson, R. Armiento, & I. A. Abrikosov Chlorine vacancy in 4H-SiC: An NV-like defect with telecom-wavelength emission. PRB, 108, 224106 (2023)

Presenters

  • Joel Davidsson

    • Linkoping University

Authors

  • Joel Davidsson

    • Linkoping University

  • Danial Shafizadeh

    • Linkoping University

  • Oscar E Bulancea-Lindvall

    • Linköping University

  • Rickard Armiento

    • Linkoping University

  • Jawad Ul-Hassan

    • Linköping University

  • Tien Son Nguygen

    • Linkoping University

  • Ivan G Ivanov

    • Linkoping University

  • Igor A. Abrikosov

    • Linkoping University