Enhancing spin coherence of an optically addressed molecular qubit by nuclear spin hyperpolarization

This is the authors' abstract. We don't add key points for this paper.

) increases systematically with nuclear polarization and is in quantitative agreement with theoretical predictions. Both the enhancement and the absolute value of the coherence time are quantitatively reproduced through cluster correlation expansion (CCE) simulations. These results establish nuclear spin hyperpolarization as a general and actively tunable approach to engineering coherence in molecular qubits. This work provides a broadly applicable design framework for high-coherence molecular and solid-state spin systems.