The energy-momentum spectrum in the \(P(\phi)_2\) quantum field theory. (English) Zbl 1155.82303
Summary: The \(P(\phi)_2\) interaction with the periodic boundary conditions is considered. It is shown that the energy-momentum spectrum lies in the forward light cone. As a consequence, this result implies that the \(P(\phi)_2\) theory in the infinite volume with the periodic boundary conditions is Lorentz invariant.
MSC:
| 82B10 | Quantum equilibrium statistical mechanics (general) |
References:
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