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. When the source and the target channels are idempotent, we give a single-letter expr…
math.OA2025
Dimension-free maximal inequalities for noncommutative spherical means over cyclic groups
Li Gao, Bang Xu
In this paper, we establish dimension-free -estimates for operator-valued maximal spherical means over cyclic groups for all and . The key ingredien…
quant-ph2024
Reverse-type Data Processing Inequality
Paula Belzig, Li Gao, Graeme Smith +1
The quantum data processing inequality asserts that two quantum states become harder to distinguish when a noisy channel is applied. On the other hand, a reverse quantum data proce…