Quantum Fisher Information Revealing Parameter Sensitivity in Long-Baseline Neutrino Experiments

Determination of the leptonic CP-violating phase $δ_{\rm CP}$, the atmospheric mixing angle $θ_{23}$, and the mass-squared difference $Δm_{31}^2$ constitutes a primary objective of current and next-generation long-baseline neutrino experiments. We employ Quantum Fisher Information (QFI) to quantify