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quant-ph2024★ 4 cited
Continuity bounds for quantum entropies arising from a fundamental entropic inequality
Koenraad Audenaert, Bjarne Bergh, Nilanjana Datta +3
We establish a tight upper bound for the difference in von Neumann entropies between two quantum states, and . This bound is expressed in terms of the von Neumann entrop…
quant-ph2024
Robustness of Fixed Points of Quantum Channels and Application to Approximate Quantum Markov Chains
Robert Salzmann, Bjarne Bergh, Nilanjana Datta
Given a quantum channel and a state which satisfy a fixed point equation approximately (say, up to an error ), can one find a new channel and a state, which are respec…