PERFECT LATTICE ACTION FOR ASYMPTOTICALLY FREE THEORIES

被引：294
作者：
HASENFRATZ, P
NIEDERMAYER, F
机构：
[1] Institute for Theoretical Physics, University of Bern, CH-3012 Bern
来源：
NUCLEAR PHYSICS B | 1994年 / 414卷 / 03期
关键词：
D O I：
10.1016/0550-3213(94)90261-5
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
There exist lattice actions which give cut-off independent physical predictions even on coarse grained lattices. Rotation symmetry is restored, the spectrum becomes exact and, in addition, the classical equations have scale invariant instanton solutions. This perfect action can be made short ranged. It can be determined by combining analytical calculations with numerical simulations on small lattices. We illustrate the method and the benefits on the d = 2 non-linear sigma-model.
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页码：785 / 814
页数：30
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