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Multiplicity of ground states in quantum field models: applications of asymptotic fields
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Description
The ground states of an abstract model in quantum field theory are investigated. By means of the asymptotic field theory, we give a necessary and sufficient condition for that the expectation value of the number operator of ground states is finite, from which we obtain a wide-usable method to estimate an upper bound of the multiplicity of ground states. Ground states of massless GSB models and the Pauli-Fierz model with spin 1/2 are investigated as examples.
Journal
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- Journal of Functional Analysis
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Journal of Functional Analysis 224 (2), 431-470, 2005-07
Elsevier BV
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Keywords
Details 詳細情報について
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- CRID
- 1363107369323453440
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- ISSN
- 00221236
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- Data Source
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- Crossref
- OpenAIRE