Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Figueroa-O'Farrill, JM"'
Autor:
Figueroa-O'Farrill, JM, Stanciu, S
Publikováno v:
JHEP 0004 (2000) 005
We analyse the possible D-brane configurations in an AdS_3xS^3xS^3xS^1 background with a NS-NS B field, by using the boundary state formalism. We study their geometry and we determine the fraction of spacetime supersymmetry preserved by these solutio
Externí odkaz:
http://arxiv.org/abs/hep-th/0001199
Autor:
Figueroa-O'Farrill, JM
Publikováno v:
Phys.Lett. B471 (1999) 128-132
Certain supergravity solutions (including domain walls and the magnetic fivebrane) have recently been generalised by Brecher and Perry by relaxing the condition that the brane worldvolume be flat. In this way they obtain examples in which the brane w
Externí odkaz:
http://arxiv.org/abs/hep-th/9910086
Autor:
Figueroa-O'Farrill, JM, Stanciu, S
Publikováno v:
JHEP 0001 (2000) 024
We re-examine the problem of determining the possible D-branes in the Nappi-Witten background. In addition to the known branes, we find that there are also D-instantons, flat euclidean D-strings and curved D-membranes admitting parallel spinors, all
Externí odkaz:
http://arxiv.org/abs/hep-th/9909164
Autor:
Figueroa-O'Farrill, JM
Publikováno v:
Class.Quant.Grav. 17 (2000) 2925-2948
We present a systematic attempt at classification of supersymmetric M-theory vacua with zero flux; that is, eleven-dimensional lorentzian manifolds with vanishing Ricci curvature and admitting covariantly constant spinors. We show that there are two
Externí odkaz:
http://arxiv.org/abs/hep-th/9904124
Autor:
Figueroa-O'Farrill, JM
Publikováno v:
Class.Quant.Grav. 16 (1999) 2043-2055
We present details of a geometric method to associate a Lie superalgebra with a large class of bosonic supergravity vacua of the type AdS x X, corresponding to elementary branes in M-theory and type II string theory.
Comment: 16 pages
Comment: 16 pages
Externí odkaz:
http://arxiv.org/abs/hep-th/9902066
Publikováno v:
Adv.Theor.Math.Phys.2:1249-1286,1999
For supergavrity solutions which are the product of an anti-de Sitter space with an Einstein space X, we study the relation between the amount of supersymmetry preserved and the geometry of X. Depending on the dimension and the amount of supersymmetr
Externí odkaz:
http://arxiv.org/abs/hep-th/9808014
Autor:
Figueroa-O'Farrill, JM
Publikováno v:
J.Geom.Phys. 35 (2000) 99-125
We present a survey of the calibrated geometries arising in the study of the local singularity structure of supersymmetric fivebranes in M-theory. We pay particular attention to the geometries of 4-planes in eight dimensions, for which we present som
Externí odkaz:
http://arxiv.org/abs/hep-th/9806040
Publikováno v:
JHEP 9807:005,1998
We complete the classification of supersymmetric configurations of two M5-branes, started by Ohta and Townsend. The novel configurations not considered before are those in which the two branes are moving relative to one another. These configurations
Externí odkaz:
http://arxiv.org/abs/hep-th/9805176
Publikováno v:
JHEP 9807:004,1998
This is the first of a series of papers devoted to the group-theoretical analysis of the conditions which must be satisfied for a configuration of intersecting M5-branes to be supersymmetric. In this paper we treat the case of static branes. We start
Externí odkaz:
http://arxiv.org/abs/hep-th/9805073
Publikováno v:
JHEP 9804:012,1998
In a recent paper, Ohta and Townsend studied the conditions which must be satisfied for a configuration of two intersecting M5-branes at angles to be supersymmetric. In this paper we extend this result to any number of M5-branes or any number of M2-b
Externí odkaz:
http://arxiv.org/abs/hep-th/9803260