3 papers
quant-ph2025
Emulation Capacity between Idempotent Channels
Idris Delsol, Omar Fawzi, Li Gao +1
We study the optimal rates of emulation (also called interconversion) between quantum channels, in three regimes: when the encoder and the decoder are unassisted, when they share c…
quant-ph2025
Computational Aspects of the Trace Norm Contraction Coefficient
Idris Delsol, Omar Fawzi, Jan Kochanowski +1
We show that approximating the trace norm contraction coefficient of a quantum channel within a constant factor is NP-hard. Equivalently, this shows that determining the optimal su…
cs.IT2023
An information theoretic necessary condition for perfect reconstruction
Idris Delsol, Olivier Rioul, Julien Béguinot +2
A new information theoretic condition is presented for reconstructing a discrete random variable based on the knowledge of a set of discrete functions of . The reconstructio…