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quant-ph2026
Tight entropy contraction beyond detailed balance
Li Gao, Jingyu Guo
We establish quantitative entropy contraction bounds for finite-dimensional quantum channels beyond detailed balance. For channels compatible with a faithful conditional expectatio…
quant-ph2026
Quantum Entropy Contraction and Factorization from Hypercontractivity
Li Gao, Lijun Wang
We prove that hypercontractivity implies entropy contraction for a single quantum channel, without a detailed balance condition. For primitive quantum Markov semigroups that are KM…