nLab S-brane

Idea

An S-brane is a spacelike brane, hence a brane instanton.

For instance in 11-dimensional supergravity S2-branes are membrane instantons.

graphics grabbed from Chen-Galtsov-Gutperle 02

Properties

Near horizon geometry

The near horizon geometry of an S$p$-brane involves hyperbolic manifolds (Gutperle-Strominger 02 (5.20), Chen-Galtsov-Gutperle 02, A., Roy 02, p. 3-4), the isometry group being $Iso(p+1) \times SO(d-p-2,1)$

Related concepts

• M-theory on hyperbolic manifolds

Table of branes appearing in supergravity/string theory (for classification see at brane scan).

brane	in supergravity	charged under gauge field	has worldvolume theory
black brane	supergravity	higher gauge field	SCFT
D-brane	type II	RR-field	super Yang-Mills theory
$(D = 2n)$	type IIA	$\,$	$\,$
D(-2)-brane	$\,$	$\,$
D0-brane	$\,$	$\,$	BFSS matrix model
D2-brane	$\,$	$\,$	$\,$
D4-brane	$\,$	$\,$	D=5 super Yang-Mills theory with Khovanov homology observables
D6-brane	$\,$	$\,$	D=7 super Yang-Mills theory
D8-brane	$\,$	$\,$
$(D = 2n+1)$	type IIB	$\,$	$\,$
D(-1)-brane	$\,$	$\,$	$\,$
D1-brane	$\,$	$\,$	2d CFT with BH entropy
D3-brane	$\,$	$\,$	N=4 D=4 super Yang-Mills theory
D5-brane	$\,$	$\,$	$\,$
D7-brane	$\,$	$\,$	$\,$
D9-brane	$\,$	$\,$	$\,$
(p,q)-string	$\,$	$\,$	$\,$
(D25-brane)	(bosonic string theory)
NS-brane	type I, II, heterotic	circle n-connection	$\,$
string	$\,$	B2-field	2d SCFT
NS5-brane	$\,$	B6-field	little string theory
D-brane for topological string			$\,$
A-brane			$\,$
B-brane			$\,$
M-brane	11D SuGra/M-theory	circle n-connection	$\,$
M2-brane	$\,$	C3-field	ABJM theory, BLG model
M5-brane	$\,$	C6-field	6d (2,0)-superconformal QFT
M9-brane/O9-plane			heterotic string theory
M-wave
topological M2-brane	topological M-theory	C3-field on G₂-manifold
topological M5-brane	$\,$	C6-field on G₂-manifold
S-brane
SM2-brane, membrane instanton
M5-brane instanton
D3-brane instanton
solitons on M5-brane	6d (2,0)-superconformal QFT
self-dual string		self-dual B-field
3-brane in 6d

References

The S-brane solutions in type II supergravity and 11-dimensional supergravity were found in

• Michael Gutperle, Andrew Strominger: Spacelike Branes, JHEP 0204:018 (2002) [arXiv:hep-th/0202210, doi:10.1088/1126-6708/2002/04/018]

• Chiang-Mei Chen, Dmitri V. Gal’tsov, Michael Gutperle, S-brane Solutions in Supergravity Theories, Phys. Rev. D66 (2002) 024043 (arXiv:hep-th/0204071)

and by a different method in

• Martin Kruczenski, Robert Myers, Amanda Peet, Supergravity S-Branes, JHEP 0205 (2002) 039 (arXiv:hep-th/0204144)

and the two formulations were shown to be equivalent in

• Shibaji Roy, On supergravity solutions of space-like Dp-branes, JHEP 0208:025, 2002 (arXiv:hep-th/0205198)