Large Gauge Transformations and the Light-Front Vacuum Structure
高能物理 - 理论
2009-10-31 v1
摘要
A residual gauge symmetry, exhibited by light-front gauge theories quantized in a finite volume, is analyzed at the quantum level. Unitary operators, which implement the symmetry, transform the trivial Fock vacuum into an infinite set of degenerate coherent-state vacua. A fermionic component of the vacuum emerges naturally without the need to introduce a Dirac sea. The vacuum degeneracy along with the derivation of the theta-vacuum is discussed within the massive Schwinger model. A possible generalization of the approach to more realistic gauge theories is suggested.
引用
@article{arxiv.hep-th/9811182,
title = {Large Gauge Transformations and the Light-Front Vacuum Structure},
author = {L. Martinovic},
journal= {arXiv preprint arXiv:hep-th/9811182},
year = {2009}
}
备注
10 pages, Latex