Perturbative gravity at null infinity

被引：82

作者：

Adamo, Tim ^{[1
]}

Casali, Eduardo ^{[1
]}

Skinner, David ^{[1
]}

机构：

[1] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 0WA, England

来源：

CLASSICAL AND QUANTUM GRAVITY | 2014年 / 31卷 / 22期

基金：

欧洲研究理事会;

关键词：

perturbative gravity; asymptotic flatness; S-matrix; GRAVITATIONAL WAVES; GENERAL RELATIVITY; SPACETIMES; FIELDS;

D O I：

10.1088/0264-9381/31/22/225008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We describe a theory that lives on the null conformal boundary I of asymptotically flat space-time, and whose states encode the radiative modes of (super) gravity. We study the induced action of the BMS group, verifying that the Ward identity for certain BMS supertranslations is equivalent to Weinberg's soft graviton theorem in the bulk. The subleading behaviour of soft gravitons may also be obtained from a Ward identity for certain superrotation generators in the extended BMS algebra proposed by Barnich and Troessaert. We show that the theory computes the complete classical gravitational S-matrix, perturbatively around the Minkowski vacuum.

引用

页数：12

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