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Universal recovery maps and approximate sufficiency of quantum relative entropy
Marius Junge, Renato Renner, David Sutter +2
The data processing inequality states that the quantum relative entropy between two states and can never increase by applying the same quantum channel to both…
Strengthened Monotonicity of Relative Entropy via Pinched Petz Recovery Map
David Sutter, Marco Tomamichel, Aram W. Harrow
The quantum relative entropy between two states satisfies a monotonicity property meaning that applying the same quantum channel to both states can never increase their relative en…
Universal recovery map for approximate Markov chains
David Sutter, Omar Fawzi, Renato Renner
A central question in quantum information theory is to determine how well lost information can be reconstructed. Crucially, the corresponding recovery operation should perform well…
Capacity of Random Channels with Large Alphabets
Tobias Sutter, David Sutter, John Lygeros
We consider discrete memoryless channels with input alphabet size and output alphabet size , where ceil for some constant . The channel transition matrix cons…