Violation of Bell’s inequalities for a two-mode squeezed vacuum state in lossy transmission lines
Radim Filip, Ladislav Mišta · Physical Review A · 2002
We investigate the transfer of a two-mode squeezed vacuum state through lossy transmission lines. It is shown that the state can violate Bell's inequalities, and consequently, excludes a local hidden variable model at pronouncedly larger transmission lengths in comparison with previous claims. This can be important for security of continuous-variable quantum cryptography employing entangled states.