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, H., Barrett, J., Leifer, M., Wilce, A., 2007. Generalized No-Broadcasting Theorem. Phys. Rev. Lett. 99, 240501. doi:10.1103/PhysRevLett.99.240501
American Physical Society