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Problems of perturbation series in non-equilibrium quantum field theories
In the standard framework of non-equilibrium quantum field theories, the pinch singularities associated to multiple products of \delta-functions do not cancel in a perturbative expansion unless the particle distributions are those for a system in thermal and chemical equilibrium.
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
1994
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/0370-2693(94)91021-9 http://cds.cern.ch/record/263770 |
| Sumario: | In the standard framework of non-equilibrium quantum field theories, the pinch singularities associated to multiple products of \delta-functions do not cancel in a perturbative expansion unless the particle distributions are those for a system in thermal and chemical equilibrium. |
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