Topological graph polynomials and quantum field theory, Part II: Mehler kernel theories
Thomas Krajewski, Vincent Rivasseau, Fabien Vignes-Tourneret · arXiv (Cornell University) · 2009
We define a new topological polynomial extending the Bollobas-Riordan one, which obeys a four-term reduction relation of the deletion/contraction type and has a natural behavior under partial duality. This allows to write down a completely explicit combinatorial evaluation of the polynomials, occurring in the parametric representation of the non-commutative Grosse-Wulkenhaar quantum field theory. An explicit solution of the parametric representation for commutative field theories based on the Mehler kernel is also provided.