Quanta: The Originality of Einstein's Approach to Relativity?
arXiv:1211.6584
Abstract
We suggest that not only quanta may have played a role in Einstein's ideas on relativity, but that they themselves may be related to the dynamical and relativistic behaviour of the electromagnetic field exhibited in a Poincaré's 1900 paper, in particular to the identical transformation law of energy and frequency for bounded plane waves.