Emulation Capacity Between Idempotent Channels
Paper in proceeding, 2026
We study the optimal rates of emulation (also called interconversion) between quantum channels. When the source and the target channels are idempotent, we give a single-letter expression for the zero-error emulation capacity in terms of structural properties of the range of the two channels. This expression shows that channel emulation is in general not reversible for idempotent channels.
Channel interconversion
zero-error capacity
idempotent channels
single-letter expression
Author
Idris Delsol
Laboratoire de l'Informatique du Parallélisme
Omar Fawzi
Laboratoire de l'Informatique du Parallélisme
Li Gao
Wuhan University
Mizanur Rahaman
Laboratoire de l'Informatique du Parallélisme
Chalmers, Mathematical Sciences, Analysis and Probability Theory
IEEE International Symposium on Information Theory Proceedings
21578095 (ISSN)
9798331580049 (ISBN)
2026 IEEE International Symposium on Information Theory, ISIT 2026
Guangzhou, China,
Guangzhou, China,
Subject Categories (SSIF 2025)
Mathematical sciences
DOI
10.1109/ISIT62367.2026.11653821