Time stamping in EPRB experiments: application on the test of non-ergodic theories
Centro de Investigaciones en Laseres y Aplicaciones (CEILAP) (CITEFA-CONICET-UNSAM),
CITEFA, J.B. de La Salle 4397, B1603, ALO Villa Martelli, Argentina
Corresponding author: a email@example.com
Published online: 9 October 2009
In Einstein-Podolsky-Rosen-Bohm (EPRB) experiments, the record of the time of detection of each single photon (“time stamping”) provides much more information than the usual record of coincidence rates. It is a preferable technique for several reasons, and it can be realized with accessible means nowadays. As an illustration of its capacities, we show that a certain class of non-ergodic (local realistic) models that violates the Bell's inequalities, even in ideally perfect setups, is disproved from the examination of time stamped files. This class of models, which has remained untested until now, exploits the finite size of the time window defining the coincidences, and it cannot be disproved by measuring coincidence rates. We use not only our own experimental data, but also the data obtained in the Innsbruck experiment with random variable analyzers.
PACS: 42.50.Xa – Optical tests of quantum theory / 03.67.Dd – Quantum cryptography and communication security / 03.65.-w – Quantum mechanics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009