Gravitational wave solutions in string and M-theory AdS Backgrounds

TL;DR

This paper constructs various gravitational wave solutions in AdS backgrounds within string and M-theory, highlighting the diversity of wave profiles enabled by p-form fields and supersymmetry preservation.

Contribution

It generalizes previous solutions by including a wider variety of wave profiles in AdS backgrounds, incorporating p-form fields and supersymmetry considerations.

Findings

Multiple explicit gravitational wave solutions in AdS_5 x S^5, AdS_7 x S^4, and AdS_4 x S^7 backgrounds.

Demonstration of solutions preserving certain supersymmetries.

Identification of the role of p-form fields in enriching wave profile diversity.

Abstract

In this paper, we present several gravitational wave solutions in AdS_5 X S^5 string backgrounds, as well as in AdS_7 X S^4 and AdS_4 X S^7 backgrounds in M-theory, generalizing the results of hep-th/0403253 by one of the authors. In each case, we present the general form of such solutions and give explicit examples, preserving certain amount of supersymmetry, by taking limits on known BPS D3 and M2, M5-brane solutions in pp-wave backgrounds. A key feature of our examples is the possibility of a wider variety of wave profiles, than in pure gravity and string/M-theory examples known earlier, coming from the presence of various p-form field strengths appearing in the gravitational wave structure.