Quantum Estimation Theory Limits in Neutrino Oscillation Experiments
The study compares Quantum Fisher Information (QFI) and classical Fisher Information (FI) for neutrino oscillation parameters. It finds that flavor measurements are optimal for mixing angles at first oscillation peaks but significantly suboptimal for CP violation ($\delta$CP). The QFI for $\delta$CP is much smaller than that of the mixing angles, meaning current experimental precision is not fundamentally limited by quantum mechanics alone.