27 citations · 68 across the 12 of their papers we have counts for
6 papers · 1 filter
Conditioning on Subalgebras - Entropy Duality and Generalized Quantum Stein's Lemma in von Neumann Algebras
Bjarne Bergh, Li Gao, Mizanur Rahaman
We establish duality relations for conditional entropies relative to subalgebras of arbitrary von Neumann algebras, including the Umegaki relative entropy as well as the sandwiched…
Robust classical and quantum communication over almost-iid channels
Liuhang Ye, Bjarne Bergh, Nilanjana Datta
The independent and identically distributed (iid) paradigm for asymptotic communication through quantum channels describes uses of a channel by . Since exact…
Quantum de Finetti theorems for states and channels in any distance measure
Liuhang Ye, Bjarne Bergh, Nilanjana Datta
Standard finite quantum de Finetti theorems approximate the -system marginals of permutation-invariant states of -systems by mixtures of independent and identically distribut…
Onset of superactivation of quantum capacity
Marco Parentin, Bjarne Bergh, Nilanjana Datta +1
Superactivation of quantum capacity is the phenomenon whereby two quantum channels, each with zero quantum capacity, can exhibit a strictly positive capacity when used in tandem. I…
Permutation Invariant Optimization Problems in Quantum Information Theory: A Framework for Channel Fidelity and Beyond
Bjarne Bergh, Marco Parentin
Exploiting permutation invariance to reduce the exponential scaling of semidefinite programs in quantum information has emerged as a powerful computational technique. In this work,…
Strong converse bounds on the classical identification capacity of the qubit depolarizing channel
Liuhang Ye, Bjarne Bergh, Nilanjana Datta
A strong converse bound for the classical identification capacity of a quantum channel is an upper bound on the asymptotic identification rate of classical messages sent through th…