TY - JOUR
T1 - Nonlocal correlations in the star-network configuration
AU - Tavakoli, Armin
AU - Skrzypczyk, Paul
AU - Cavalcanti, Daniel
AU - Acín, Antonio
PY - 2014/12/4
Y1 - 2014/12/4
N2 - The concept of bilocality was introduced to study the correlations which arise in an entanglement-swapping scenario, where one has two sources which can naturally be taken to be independent. This additional constraint leads to stricter requirements than simply imposing locality, in the form of bilocality inequalities. In this work we consider a natural generalization of the bilocality scenario; namely, the star network consisting of a single central party surrounded by n edge parties, each of which shares an independent source with the center. We derive inequalities which are satisfied by all local correlations in this scenario, for the cases when the central party performs (i) two dichotomic measurements (ii) a single Bell-state measurement. We demonstrate quantum violations of these inequalities and study both the robustness to noise and to losses.
AB - The concept of bilocality was introduced to study the correlations which arise in an entanglement-swapping scenario, where one has two sources which can naturally be taken to be independent. This additional constraint leads to stricter requirements than simply imposing locality, in the form of bilocality inequalities. In this work we consider a natural generalization of the bilocality scenario; namely, the star network consisting of a single central party surrounded by n edge parties, each of which shares an independent source with the center. We derive inequalities which are satisfied by all local correlations in this scenario, for the cases when the central party performs (i) two dichotomic measurements (ii) a single Bell-state measurement. We demonstrate quantum violations of these inequalities and study both the robustness to noise and to losses.
UR - http://www.scopus.com/inward/record.url?scp=84918547835&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.90.062109
DO - 10.1103/PhysRevA.90.062109
M3 - Article (Academic Journal)
AN - SCOPUS:84918547835
SN - 1050-2947
VL - 90
JO - Physical Review A: Atomic, Molecular and Optical Physics
JF - Physical Review A: Atomic, Molecular and Optical Physics
IS - 6
ER -