Reverse Coherent Information
  In this letter we define a family of entanglement distribution protocols assisted by feedback classical communication that gives an operational interpretation to reverse coherent information, i.e., the symmetric counterpart of the well known coherent information. This lead to the definition of a new entanglement distribution capacity that exceeds the unassisted capacity for some interesting channels. 
Ra\'ul Garc\'ia-Patr\'on, Stefano Pirandola, Seth Lloyd, and Jeffrey   H. Shapiro