A Collection of Pinsker-type Inequalities for Quantum Divergences
Abstract
Pinsker's inequality sets a lower bound on the Umegaki divergence of two quantum states in terms of their trace distance. In this work, we formulate corresponding estimates for a variety of quantum and classical divergences including $f$-divergences like Hellinger and $χ^2$-divergences as well as Rényi divergences and special cases thereof like the Umegaki divergence, collision divergence, max divergence. We further provide a strategy on how to adapt these bounds to smoothed divergences.
Fields of Study & Subjects
Statistical Mechanics and Entropy
Mathematical Inequalities and Applications
Wireless Communication Security Techniques
Publication details
- Journal / source
- 2026 IEEE International Symposium on Information Theory (ISIT)
- Publisher
- IEEE
- Pages
- 1–6
- Publication date
- 1 June 2026