2 papers
quant-ph2026
No information transmission through quantum channels above capacity
Hao-Chung Cheng, Marco Tomamichel
We show that the capacity of a quantum channel demarcates a phase transition: while reliable transmission below capacity is always possible, any attempt to transmit information abo…
quant-ph2026
On the Power of Adaptivity in Testing Quantum States in Fidelity
Jan Seyfried, Sayantan Sen, Marco Tomamichel
We study the problems of quantum state certification, equivalence testing and independence testing. In certification, given samples of an unknown quantum state and the descript…