Enhancing the violation of the einstein-podolsky-rosen local realism by quantum hyperentanglement.
Mermin's observation [Phys. Rev. Lett. 65, 1838 (1990)] that the magnitude of the violation of local realism, defined as the ratio between the quantum prediction and the classical bound, can grow exponentially with the size of the system is demonstrated using two-photon hyperentangled states entangled in polarization and path degrees of freedom, and local measurements of polarization and path simultaneously.
Barbieri
Marco
M
Dipartimento di Fisica dell'Università La Sapienza and Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, 00185 Roma, Italy.
De Martini
Francesco
F
Mataloni
Paolo
P
Vallone
Giuseppe
G
Cabello
Adán
A