Bell experiments with energy-time (and time-bin) entanglement
KTH/Nordita/SU seminar in Theoretical Physics [before December 2013]
Wednesday 20 August 2008
from 11:00
to 12:00 at
FA31
Speaker :
Adan Cabello (Sevilla)
Abstract :
Aerts et al. [Phys. Rev. Lett. 83, 2872 (1999)] showed that Franson's
Bell experiment with energy-time entanglement [Phys. Rev. Lett. 62,
2205 (1989)] does not and cannot violate local realism. Despite this
fundamental deficiency, and despite that this defect can be exploited
to create a Trojan horse attack in Bell inequality-based quantum
cryptography, Franson-type experiments have been extensively used for
Bell tests and Bell inequality-based quantum cryptography, and have
become standard in quantum optics. We show that Franson's
postselection procedure applied to local models can produce any
violation of the Bell-CHSH inequality. We then introduce a novel
two-photon energy-time (and time-bin) Bell experiment without this
defect.
