On Infravacua and the Localisation of Sectors
arXiv:math-ph/9806003 · doi:10.1063/1.532642
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.
LaTeX, 18 pages, minor corrections in order to conform with published version
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