SELF-DUAL GRAVITY AS A LARGE-N LIMIT OF THE 2D NONLINEAR SIGMA MODEL

被引：97

作者：

PARK, QH

机构：

[1] Department of Physics and Astronomy, University of Maryland, College Park, College Park

来源：

PHYSICS LETTERS B | 1990年 / 238卷 / 2-4期

关键词：

D O I：

10.1016/0370-2693(90)91737-V

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The 4D self-dual gravity is shown to be equivalent to a large-N limit of the 2D non-linear sigma model with Wess-Zumino terms only. Infinite dimensional symmetries of the self-dual Einstein equations are derived and shown to form a closed algebra which includes W∞-a large-N limit of Zamolodchikov's WN algebra. These are interpreted in terms of Penrose's twistor theory. © 1990.

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页码：287 / 290

页数：4

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