On field theories with degenerate ground
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K Baumann; G Eder; R Sexl; W Thirring
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Article
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1961
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Elsevier Science
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English
โ 444 KB
A model field theory of the superconducting type is solved exactly. The exact solution is compared with the Bardeen-Cooper-schrieffer solution. The exact ground state is nondegenerate while the Bardeen-Cooper-fohriefter ground state is degenerate. The connection between the two types of ground state