Negative-frequency modes in quantum field theory

4th Symposium on Prospects in the Physics of Discrete Symmetries

Dickinson, Robert^1 ; Forshaw, Jeff^1 ; Millington, Peter^2

Consortium for Fundamental Physics, School of Physics and Astronomy, University of Manchester, Manchester

M13 9PL, United Kingdom^1

Physik Department T70, James-Franck-Straße, Technische Universität München, Garching

85748, Germany^2

关键词: Electroweak theory;    Negative frequency;    Perturbation theory;    Quantum field theory;    Resonance effect;    S-matrix elements;    Transition amplitudes;    Zero-point energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/631/1/012059/pdf
DOI  :  10.1088/1742-6596/631/1/012059

来源: IOP

【 摘 要 】

We consider a departure from standard quantum field theory, constructed so as to permit momentum eigenstates of both positive and negative energy. The resulting theory is intriguing because it brings about the cancellation of leading ultra-violet divergences and the absence of a zero-point energy. The theory gives rise to tree-level source-to-source transition amplitudes that are manifestly causal and consistent with standard S-matrix elements. It also leads to the usual result for the oblique corrections to the standard electroweak theory. Remarkably, the latter agreement relies on the breakdown of naive perturbation theory due to resonance effects. It remains to be shown that there are no problems with perturbative unitarity.