Time spamping in EPRB experiments: application on the test of non ergodic theories

M.B. AGUERO; A.HNILO; M. KOVALSKY; M. LAROTONDA

EUROPEAN PHYSICAL JOURNAL D

EDP SCIENCES S A

Año: 2009 vol. 55 p. 705 - 709

1434-6079

In Einstein-Podolsky-Rosen-Bohm (EPRB) experiments, the record of the time of detection ofeach single photon (“time stamping”) provides much more information than the usual record of coincidencerates. 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 thatviolates the Bell’s inequalities, even in ideally perfect setups, is disproved from the examination of timestamped files. This class of models, which has remained untested until now, exploits the finite size of thetime window defining the coincidences, and it cannot be disproved by measuring coincidence rates. We usenot only our own experimental data, but also the data obtained in the Innsbruck experiment with randomvariable analyzers.