Fig. 3: Configuration coordinate diagrams responsible for ZPL emission.

Configuration coordinate diagrams of the defect qubits for a NCVC−1 in diamond, b CBVN in hBN, and c WSe in MoSe2. The solid horizontal lines correspond to the phonon energy levels in the harmonic approximation. The ground state and the excited state are labeled as 3A2 and 3E for NCVC−1 in diamond31 and MX in TMDs; the states are labeled as (1)3B1 and (2)3B1 for CBVN in hBN40.