TY  - JOUR
AU  - Lippert, Thomas
TI  - Lattice quantum electrodynamics near the phase transition
JO  - International journal of modern physics / C Computational physics and physical computation C
VL  - 04
IS  - 01
SN  - 1793-6586
CY  - Singapore [u.a.]
PB  - World Scientific
M1  - FZJ-2019-01106
SP  - 163 - 179
PY  - 1993
AB  - Numerical simulations of quantum electrodynamics near the phase transition suffer from an extreme slowing down on large lattices. The two leading terms of the decaying autocorrelation function can be attributed to the influence of first-order phase transition effects, called supercritical slowing down, and second-order phase transition effects, called critical slowing down, respectively. We show that we can bypass supercritical slowing down using a conventional local updating algorithm based on a phenomenological weight ratio fixing method.As for critical slowing down, we apply a new global multi-scale updating algorithm which removes critical slowing down completely. We compare the structure of the local vs. the global algorithm as well as their implementation on the Connection Machine CM-2, analyze their computational complexity and present actual performance measurements.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1142/S0129183193000185
UR  - https://juser.fz-juelich.de/record/860331
ER  -