2 papers
quant-ph2025
Mutual Information Bounded by Fisher Information
Wojciech Górecki, Xi Lu, Chiara Macchiavello +1
We derive a general upper bound to mutual information in terms of the Fisher information. The bound may be further used to derive a lower bound for the Bayesian quadratic cost. The…
quant-ph2024
Number of bits returned by a quantum estimation
Xi Lu, Wojciech Górecki, Chiara Macchiavello +1
We give two upper bounds to the mutual information in arbitrary quantum estimation strategies. The first is based on some simple Fourier properties of the estimation apparatus. The…