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Open Quantum Systems Decoherence
Emulation Capacity between Idempotent Channels
arXiv
Authors: Idris Delsol, Omar Fawzi, Li Gao, Mizanur Rahaman
Year
2025
Paper ID
16879
Status
Preprint
Abstract Read
~2 min
Abstract Words
87
Citations
N/A
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.
Why This Paper Matters
- This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
- It adds a 2025 reference point for readers tracking recent quantum research.
- We study the optimal rates of emulation (also called interconversion) between quantum channels.
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