But writing the proof and reading it is communication.
“Reading it” is akin to “having perfect information about the full density matrix of the system”. You don’t have to perturb the system to get information out of it.
But writing the proof and reading it is communication.
“Reading it” is akin to “having perfect information about the full density matrix of the system”. You don’t have to perturb the system to get information out of it.