# metadata.dc.description.abstract[].value
We study the most general unitary transformation that transform the Hamiltonians of particles of spins 0, 1/2 or 1, into Hamiltonians containing even or odd matrices only. We present also the expressions for the position operators for each transformation that are valid for the three kinds of particles mentioned above.

# metadata.dc.source[].value
Articles publicats en revistes (Física de la Matèria Condensada)