Letters in Mathematical Physics

, Volume 77, Issue 3, pp 235–248 | Cite as

On the Generator of Massive Modular Groups

  • Timor Saffary


The purpose of this paper is to shed more light on the transition from the known massless modular action to the wanted massive one in the case of forward light cones and double cones. The infinitesimal generator δm of the modular automorphism group \(\big(\sigma_{\rm m}^t\big)_{t\in\mathbb R}\) is investigated, in particular, some assumptions on its structure are verified explicitly for two concrete examples.

Mathematics Subject Classification (2000)

81T05 46L40 46L60 47G30 


algebraic quantum field theory modular automorphism group pseudo-differential operator 


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© Springer 2006

Authors and Affiliations

  1. 1.Fachbereich Wirtschafts- und OrganisationswissenschaftenHelmut-Schmidt-Universität, Universität der Bundeswehr HamburgHamburgGermany

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