Aspects of multistation quantum information broadcasting
  We study quantum information transmission over multiparty quantum channel. In particular, we show an equivalence of different capacity notions and provide a multiletter characterization of a capacity region for a general quantum channel with $k$ senders and $m$ receivers. We point out natural generalizations to the case of two-way classical communication capacity. 
Maciej Demianowicz and Pawe{\l} Horodecki