publication . Preprint . Article . 2006

Another proof of Gell-Mann and Low's theorem

Luca Guido Molinari;
Open Access English
  • Published: 11 Dec 2006
Abstract
The theorem by Gell-Mann and Low is a cornerstone in QFT and zero-temperature many-body theory. The standard proof is based on Dyson's time-ordered expansion of the propagator; a proof based on exact identities for the time-propagator is here given.
Subjects
arXiv: Physics::History of Physics
free text keywords: Mathematical Physics, Condensed Matter - Strongly Correlated Electrons, High Energy Physics - Theory, Propagator, No-broadcast theorem, Mathematics, Relationship between string theory and quantum field theory, Quantum mechanics, Quantum no-deleting theorem, Beta function (physics), Quantum gravity, Quantum field theory, S-matrix
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publication . Preprint . Article . 2006

Another proof of Gell-Mann and Low's theorem

Luca Guido Molinari;