Continuous Spectrum of Automorphism Groups and the Infraparticle Problem
Continuous Spectrum of Automorphism Groups and the Infraparticle Problem
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自同构群的连续谱和次粒子问题
DOI:
10.1007/s00220-010-1091-y
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发表时间:
2010
影响因子:
2.4
通讯作者:
W. Dybalski
中科院分区:
文献类型:
--
作者:
W. Dybalski
This paper presents a general framework for a refined spectral analysis of a group of isometries acting on a Banach space, which extends the spectral theory of Arveson. The concept of a continuous Arveson spectrum is introduced and the corresponding spectral subspace is defined. The absolutely continuous and singular-continuous parts of this spectrum are specified. Conditions are given, in terms of the transposed action of the group of isometries, which guarantee that the pure-point and continuous subspaces span the entire Banach space. In the case of a unitarily implemented group of automorphisms, acting on aC*-algebra, relations between the continuous spectrum of the automorphisms and the spectrum of the implementing group of unitaries are found. The group of spacetime translation automorphisms in quantum field theory is analyzed in detail. In particular, it is shown that the structure of its continuous spectrum is relevant to the problem of existence of (infra-)particles in a given theory.
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DOI:
--
发表时间:
1979
期刊:
影响因子:
--
作者:
J. Fröhlich;G. Morchio;F. Strocchi
通讯作者:
F. Strocchi
影响因子:
2.4
作者:
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V. Enss
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2.4
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DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
R. Exel
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R. Exel
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
P. Jorgensen
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P. Jorgensen