This thesis studies two distinct frontiers of quantum information processing: the fundamental physical limits of dynamical evolution and the practical realization of secure quantum communication networks.
@article{arxiv.2605.17532,
title = {From Fundamental Dynamics to Applied Cryptography: Studies on the Quantum Speed Limit and Fully Passive Quantum Key Distribution},
author = {Jinjie Li},
journal= {arXiv preprint arXiv:2605.17532},
year = {2026}
}