85 citations
5 papers
Revisiting observables in generally covariant theories in the light of gauge fixing methods
J. M. Pons, D. C. Salisbury, K. A. Sundermeyer
We derive for generally covariant theories the generic dependency of observables on the original fields, corresponding to coordinate-dependent gauge fixings. This gauge choice is e…
Pascual Jordan's resolution of the conundrum of the wave-particle duality of light
Anthony Duncan, Michel Janssen
In 1909, Einstein derived a formula for the mean square energy fluctuation in black-body radiation. This formula is the sum of a wave term and a particle term. In a key contributio…
The interpretation of the Einstein-Rupp experiments and their influence on the history of quantum mechanics
Jeroen van Dongen
The Einstein-Rupp experiments were proposed in 1926 by Albert Einstein to study the wave versus particle nature of light. Einstein presented a theoretical analysis of these experim…
Emil Rupp, Albert Einstein and the canal ray experiments on wave-particle duality: Scientific fraud and theoretical bias
Jeroen van Dongen
In 1926 Emil Rupp published a number of papers on the interference properties of light emitted by canal ray sources. These articles, particularly one paper that came into being in…
A forgotten little chapter on isoperimetric inequalities: On the fraction of a convex and closed plane area lying outside a circle with which it shares a diameter
Jose M. Pacheco
Often some interesting or simply curious points are left out when developing a theory. It seems that one of them is the existence of an upper bound for the fraction of area of a co…