On Infravacua and the Localisation of Sectors

Details On Infravacua and the Localisation of Sectors On Infravacua and the Localisation of Sectors

1998-06-05

arxiv.org/abs/math-ph/9806003v2

J.Math.Phys. 39 (1998) 6353-6363

Physics

Mathematical Physics

LaTeX, 18 pages, minor corrections in order to conform with published version

Scientific paper

10.1063/1.532642

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.

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