Bell Test experiments explained without entanglement

Gerard van der Ham

The correlation in Bell-test experiments in relation to elektronspin can be explained according to local-realism. A simple model shows that the position of the detectors respective of the direction of movement of the elektrons define vektorspaces in which the opposit spinvektors of entangled pairs of elektrons are, which give equal spin result. With this model the identification of those vektorspaces and the measuring and counting of the spinvektors can be described. In this way correlation, as it is calculated in quantum theory and found in experiments, is explained.

G. Fano, S. M. Blinder

Kamal Kishore Pant

Jeffrey H. Boyd

The fact that loophole-free Bell test experiments have proved Einstein’s local realism wrong, does not prove that the quantum mechanical (QM) model is correct, because the Theory of Elementary Waves (TEW) Axioms can also explain the Bell test experiments. Bi-Rays are a pair of coaxial elementary rays traveling at the speed of light in countervailing directions. In a Bell test experiment a Bi-Ray stretches from Alice’s equipment, through the fiberoptic cable, across the 2-photon source, through more fiberoptic cable, to Bob’s equipment. A pair of entangled photons is born into that Bi-Ray. Each photon follows the same Bi-Ray in opposite directions. This model produces the same Bell test results found by QM. According to QM this would be classified as a “non-local” model, so it is no surprise that it can explain the Bell test results. But it is a different model than QM. TEW supports a more realistic view of Nature, based on better Axioms. Although QM can explain quantum experiments, it requires that you believe the quantum world is weird. TEW Axioms explain the quantum world in a way that is more intuitively similar to the world of everyday experience.

F.J. Duarte

D. Salart

The scope of this thesis is to present and discuss some experiments related to the quantum phenomenon of entanglement. We start by introducing the two forms of entanglement that we use: energy-time entanglement and single-photon entanglement. We explain how entanglement can be created through the process of spontaneous parametric down conversion in non-linear waveguides. We explain the importance of Bell inequalities and how we can use them to test the nonlocal nature of quantum correlations. The first experiment is a Bell test with spacelike separation, where we explore the possibility that a change in the gravitational field around one of the detection devices could trigger the collapse of the wavefunction, ending the entangled state. In the second one, we test the hypothesis that a superluminal signal defined in a universal privileged reference frame travelling between the detectors could influence the results. Last, we present the first experimental implementation of an entanglement purification protocol using single-photon entanglement and linear optics elements.