Gauge fixing, co-BRST and time evolution in QED

Abstract

We consider BRST-invariant inner product states for quantum electrodynamics constructed from trivial BRST-invariant states and a gauge regulator. The trivial states are products of matter and ghost states and are annihilated by hermitian operators. The co-BRST operator and some further gauge-fixing regulators are found. The relation between gauge fixing and time evolution of both the trivial and the inner product states is discussed.

Latex, 24 pages, included some new references and comments

Cited by in corpus (2)

• Time evolution in general gauge theories defined on inner product spaces
• BRST-co-BRST Quantization of Reparametrization Invariant Theories