Emulation Capacity Between Idempotent Channels
Abstract
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 not reversible for general idempotent channels. Furthermore, we establish a strong converse rate that matches with the zero-error emulation capacity when the source or the target channel is either an identity or a completely dephasing channel.
Fields of Study & Subjects
Quantum Information and Cryptography
Wireless Communication Security Techniques
Quantum Mechanics and Applications
Publication details
- Journal / source
- 2026 IEEE International Symposium on Information Theory (ISIT)
- Publisher
- IEEE
- Pages
- 1–6
- Publication date
- 1 June 2026
- Language
- EN