Gauge invariance and the vacuum state

Details Gauge invariance and the vacuum state Gauge invariance and the vacuum state

1999-05-07

arxiv.org/abs/quant-ph/9905021v1

Can.J.Phys. 76 (1998) 111-127

Physics

Quantum Physics

32 pages

Scientific paper

10.1139/cjp-76-2-111

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.

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