title: Bound nonlocality and activation.
abstract: We investigate nonlocality distillation using measures of nonlocality based on the Elitzur-Popescu-Rohrlich decomposition. For a certain number of copies of a given nonlocal box, we define two quantities of interest: (i) the nonlocal cost and (ii) the distillable nonlocality. We find that there exist boxes whose distillable nonlocality is strictly smaller than their nonlocal cost. Thus nonlocality displays a form of irreversibility which we term "bound nonlocality." Finally, we show that nonlocal distillability can be activated.
authors.affiliation: H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Brunner
authors.forename: Daniel
authors.initials: D
authors.lastname: Cavalcanti
authors.forename: Alejo
authors.initials: A
authors.lastname: Salles
authors.forename: Paul
authors.initials: P
authors.lastname: Skrzypczyk