ADAQ Database Leads to Experimental Verification of Telecom Defect Qubit

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.