Mikhail Tentyukov
(Karlsruhe University)
11/5/08, 2:00 PM
3. Computation in Theoretical Physics
Parallel Talk
We report on the status of the current development in parallelization of the symbolic manipulation system
FORM. Most existing FORM programs will be able to take advantage of
the parallel execution, without the need for modifications.
Dr
Takahiro Ueda
(KEK)
11/5/08, 2:25 PM
3. Computation in Theoretical Physics
Parallel Talk
Nowadays the sector decomposition technique, which can isolate divergences from parametric representations of integrals, becomes quite useful tool for numerical evaluations of the Feynman loop integrals. It is used to verify the analytical results of multi-loop integrals in the Euclidean region, or in some cases practically used in the physical region by combining with other methods handling...
Thomas Hahn
(MPI Munich)
11/5/08, 2:50 PM
3. Computation in Theoretical Physics
Parallel Talk
The talk will cover the latest version of the Feynman-diagram calculator FormCalc. The most significant improvement is the communication of intermediate expressions from FORM to Mathematica and back, for the primary purpose of introducing abbreviations at an early stage. Thus, longer expressions can be treated and a severe bottleneck in particular for processes with high multiplicities removed.
Dr
Fukuko YUASA
(KEK)
11/5/08, 3:15 PM
3. Computation in Theoretical Physics
Parallel Talk
We apply a 'Direct Computation Method', which is purely numerical, to evaluate
Feynman integrals. This method is based on the combination of an efficient
numerical integration and an efficient extrapolation strategy. In addition,
high-precision arithmetic and parallelization techniques can be used if required.
We present our recent progress in the development of this method and show...
