DOI

For a class of bipartite quantum states, we find a nontrivial lower bound on the entropy gain resulting from the action of a tensor product of the identity channel with an arbitrary channel. We use the obtained result to bound the output entropy of the tensor product of a dephasing channel with an arbitrary channel from below. We characterize phase-damping channels that are particular cases of dephasing channels.

Язык оригиналаанглийский
Страницы (с-по)397-406
Число страниц10
ЖурналTheoretical and Mathematical Physics(Russian Federation)
Том182
Номер выпуска3
DOI
СостояниеОпубликовано - 1 мар 2015

    Предметные области Scopus

  • Математическая физика
  • Статистическая и нелинейная физика

ID: 41887848