Philippe Faist

@phfaist.bsky.social

703 Followers 513 Following

Tenured senior researcher in quantum information at the Freie Universität Berlin (previously: PhD at ETH Zurich & post-doc at IQIM Caltech) https://phfaist.com/

Much like how we replace a complex or unknown quantum state by a thermal state in a many-body system [(a)], I'd like to think that we can replace complex or unknown evolution 𝒰 by the thermal quantum channel [(b)]

The channel's entropy quantifies how entropic 𝒩's output is guaranteed to be, for any input state, and even using a reference system as side information.