Perturbative calculation of multi-loop Feynman Diagrams. New type of expansion for critical exponents
We show that the calculation of L-loop Feynman integrals in D dimensions can be reduced to a series of matrix multiplications in D times L dimensions. This gives rise to a new type of expansions for the critical exponents in three dimensions in which all coefficients can be calculated exactly.
Physics Letters B
- Pub Date:
- November 1999
- High Energy Physics - Theory;
- Condensed Matter
- Author Information under http://www.physik.fu-berlin.de/~kleinert/institution.html . Latest update of paper also at http://www.physik.fu-berlin.de/~kleinert/297