Comparing different improvement programs for the N-vector model

被引：7
作者：
Caracciolo, S
Pelissetto, A
机构：
[1] IST NAZL FIS NUCL, SEZIONE PISA, I-56100 PISA, ITALY
[2] UNIV PISA, DIPARTIMENTO FIS, I-56100 PISA, ITALY
来源：
PHYSICS LETTERS B | 1997年 / 402卷 / 3-4期
关键词：
D O I：
10.1016/S0370-2693(97)00495-4
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We discuss the connection between various types of improved actions in the context of the two-dimensional sigma-model. We also discuss spectrum-improved actions showing that these actions do not have any improved behaviour. An O(a(2)) on-shell improved action with all couplings defined on a plaquette and satisfying reflection positivity is also explicitly constructed. (C) 1997 Published by Elsevier Science B.V.
引用
收藏
页码：335 / 340
页数：6
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