Experimental quantum contextuality: New developments and perspectives
by
Prof.Adán Cabello(Universidad de Sevilla, Sevilla, Spain)
→
Europe/Rome
Aula Conversi (Dip. di Fisica - Edificio G. Marconi)
Aula Conversi
Dip. di Fisica - Edificio G. Marconi
Description
A complete experimental setup to test the violation,
predicted by quantum mechanics, by any two-qubit state of an
inequality for noncontextual hidden variable theories introduced in
Phys. Rev. Lett. 101, 210401 (2008) is described. It is shown that a
state-independent violation can be observed using the polarization
and path of single photons, and standard linear optics components.
The fact that the expected violation occurs even for a totally mixed
state can be used to test, with the help of hyperentangled states,
the possibility of Einstein-Podolsky-Rosen elements of reality,
instead of just general noncontextual hidden variable theories. Some
specific requirements and loopholes of all these experiments are
discussed.
Work in collaboration with E. Amselem, M. Radmark, M. Bourennane
(Stockholm), O. Gühne (Innsbruck), and J.-A. Larsson (Linköpings).
