The problem of positivity in 1+1 dimensions and Krein spaces

Details The problem of positivity in 1+1 dimensions and Krein spaces The problem of positivity in 1+1 dimensions and Krein spaces

2012-01-14

arxiv.org/abs/1201.2975v1

Physics

Mathematical Physics

8 pages, presented to Accadem. dei Fisioc. Siena

Scientific paper

The possibility of introducing a positive metric on the states of the
massless scalar field in 1+1 dimensions by mean of Krein spaces is examined.
Two different realisations in Krein spaces for the massless scalar field are
compared. It is proved that one is a particular case of the other. The
peculiarities and advantages of both realisations are discussed.

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