Covariance Systems on the Projective Line
Abstract
We study the positiveoperatorvalued measures on the projective real line covariant with respect to the projective group, assuming that the energy is a positive operator. This problem is similar to the more complicated problem of finding the positiveoperatorvalued measures on the compactified Minkowski spacetime covariant with respect to the conformal group. It also describes a timeofarrival observable for a free particle covariant with respect to linear canonical transformations.
 Publication:

arXiv eprints
 Pub Date:
 January 2000
 arXiv:
 arXiv:quantph/0001109
 Bibcode:
 2000quant.ph..1109P
 Keywords:

 Quantum Physics
 EPrint:
 21 pages