Gauge invariance and the vacuum state
Quantum Physics
2009-10-31 v1
Abstract
Quantum field theory is assumed to be gauge invariant. It is shown that for a Dirac field the assumption of gauge invariance impacts on the way the vacuum state is defined. It is shown that the conventional definition of the vacuum state must be modified to take into account the requirements of gauge invariance.
Cite
@article{arxiv.quant-ph/9905021,
title = {Gauge invariance and the vacuum state},
author = {Dan Solomon},
journal= {arXiv preprint arXiv:quant-ph/9905021},
year = {2009}
}
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32 pages