5 citations · 18 across the 9 of their papers we have counts for
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hep-th2003
Quantum field theory and Hopf algebra cohomology
Christian Brouder, Bertfried Fauser, Alessandra Frabetti +1
We exhibit a Hopf superalgebra structure of the algebra of field operators of quantum field theory (QFT) with the normal product. Based on this we construct the operator product an…
hep-th2003
Quantum field theory of degenerate systems
Christian Brouder
To set up a self-consistent quantum field theory of degenerate systems, the unperturbed state should be described by a density matrix instead of a pure state. This increases the co…