Multicanonical Hybrid Monte Carlo: Boosting Simulations of Compact QED

Details Multicanonical Hybrid Monte Carlo: Boosting Simulations of Compact QED Multicanonical Hybrid Monte Carlo: Boosting Simulations of Compact QED

1998-09-21

arxiv.org/abs/hep-lat/9809160v1

Phys.Rev. D59 (1999) 054509

Physics

High Energy Physics

High Energy Physics - Lattice

15 pages, 8 figures

Scientific paper

10.1103/PhysRevD.59.054509

We demonstrate that substantial progress can be achieved in the study of the phase structure of 4-dimensional compact QED by a joint use of hybrid Monte Carlo and multicanonical algorithms, through an efficient parallel implementation. This is borne out by the observation of considerable speedup of tunnelling between the metastable states, close to the phase transition, on the Wilson line. We estimate that the creation of adequate samples (with order 100 flip-flops) becomes a matter of half a year's runtime at 2 Gflops sustained performance for lattices of size up to 24^4.

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