MADs define a hierarchy of distinguishability measures for multi-time quantum processes that increases with coherent memory dimension and saturates the strategy-norm benchmark at finite memory.
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quant-ph 2years
2026 2verdicts
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The paper shows that for some pairs of unitary channels, perfect discrimination is possible with separable states but nearly impossible with maximally entangled states, introducing MEWC and MEBC concepts.
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Distinguishing quantum processes with bounded coherent memory
MADs define a hierarchy of distinguishability measures for multi-time quantum processes that increases with coherent memory dimension and saturates the strategy-norm benchmark at finite memory.
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Entanglement in quantum channel discrimination: sometimes less is more
The paper shows that for some pairs of unitary channels, perfect discrimination is possible with separable states but nearly impossible with maximally entangled states, introducing MEWC and MEBC concepts.