1,720,989 research outputs found
CAN EXPERIMENTAL TESTS OF BELL INEQUALITIES PERFORMED WITH PSEUDOSCALAR MESONS BE DEFINITIVE?
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DOUBLE ENTANGLEMENT AND QUANTUM CRYPTOGRAPHY
No full textWe propose a quantum
transmission based on bi-photons, which are doubly-entangled both in
polarisation and phase. This scheme finds a natural application in quantum
cryptography, where we show that an eventual eavesdropper is bound to
introduce a larger error on the quantum communication than for a single
entangled bi-photon communication, when he steels the same information
On the measurement of photon flux in parametric down-conversion
No full textWe report the measurement of the photons flux produced in parametric down-conversion, performed
in photon counting regime with actively quenched silicon avalanche photodiodes as single photon
detectors. Measurements are done with the detector in a well defined geometrical and spectral situation.
By comparison of the experimental data with the theory, a value for the second order
susceptibilities of the non linear crystal can be inferred
New experimental test of Bell inequalities by the use of a non-maximally entangled photon state
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