Comparing iterative methods for overlap and twisted mass fermions

被引：3

作者：

Chiarappa, T

Jansen, K

Nagai, KI

Papinutto, M

Scorzato, L

Shindler, A

Urbach, C

Wenger, U

Wetzorke, I

机构：

[1] NIC DESY Zeuthen, D-15738 Zeuthen, Germany

[2] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[3] Free Univ Berlin, Inst Theoret Phys, D-14196 Berlin, Germany

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2005年 / 140卷

关键词：

D O I：

10.1016/j.nuclphysbps.2004.11.281

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：

We present a systematic comparison of various iterative methods to obtain the fermion propagator with both overlap and twisted mass fermions at fixed pion mass in the quenched approximation. Taking the best available algorithm in each case we find that calculations with the overlap operator are by a factor of 20-40 more expensive than with the twisted mass operator at the parameter values considered here. For the overlap operator we also compare the efficiency of various methods for calculating the topological index.

引用

页码：853 / 855

页数：3

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