2 papers
quant-ph2026
Exact characterizations for quantum conditional mutual information and some other entropies
Zhou Gang
Lieb and Ruskai's strong subadditivity theorem, which shows that the conditional mutual information must be nonnegative, is fundamental in quantum theory. It has numerous applicati…
quant-ph2022
On the Evolution of States in a Quantum-Mechanical Model of Experiments
Jürg Fröhlich, Zhou Gang
The postulates of von Neumann and Lüders concerning measurements in quantum mechanics are discussed and criticized in the context of a simple model proposed by Gisin. The main purp…