4 citations · 13 across the 7 of their papers we have counts for
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Quantum groups and interacting quantum fields
Christian Brouder
If C is a cocommutative coalgebra, a bialgebra structure can be given to the symmetric algebra S(C). The symmetric product is twisted by a Laplace pairing and the twisted product o…
Quantum fields and quantum groups
Christian Brouder, Robert Oeckl
Quantum fields are shown to provide an example of infinite-dimensional quantum groups. A dictionary is established between quantum field and quantum group concepts: the expectation…
Renormalization of QED in an external field
Christian Brouder
The Schwinger equations of QED are rewritten in three different ways as integral equations involving functional derivatives, which are called weak field, strong field, and SCF quan…
A quantum field algebra
Christian Brouder
The Laplace Hopf algebra created by Rota and coll. is generalized to provide an algebraic tool for combinatorial problems of quantum field theory. This framework encompasses commut…