Generalized no-broadcasting theorem.
We prove a generalized version of the no-broadcasting theorem, applicable to essentially any nonclassical finite-dimensional probabilistic model satisfying a no-signaling criterion, including ones with "superquantum" correlations. A strengthened version of the quantum no-broadcasting theorem follows, and its proof is significantly simpler than existing proofs of the no-broadcasting theorem.
Barnum
Howard
H
CCS-3: Information Sciences, MS B256, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. barnum@lanl.gov
Barrett
Jonathan
J
Leifer
Matthew
M
Wilce
Alexander
A