On infravacua and the localization of sectors
Abstract
A certain class of superselection sectors of the free massless scalar field in 3 space dimensions is considered. It is shown that these sectors, which cannot be localised with respect to the vacuum, acquire a much better localisation, namely in spacelike cones, when viewed in front of suitable ``infravacuum'' backgrounds. These background states coincide, essentially, with a class of states introduced by Kraus, Polley and Reents as models for clouds of infrared radiation.
 Publication:

Journal of Mathematical Physics
 Pub Date:
 December 1998
 DOI:
 10.1063/1.532642
 arXiv:
 arXiv:mathph/9806003
 Bibcode:
 1998JMP....39.6353K
 Keywords:

 12.20.Ds;
 Specific calculations;
 Mathematical Physics;
 High Energy Physics  Theory;
 81T05
 EPrint:
 LaTeX, 18 pages, minor corrections in order to conform with published version