117 citations · 876 across the 27 of their papers we have counts for
25 papers · 1 filter
Penrose limits of Lie Branes and a Nappi--Witten braneworld
Sonia Stanciu, José Figueroa-O'Farrill
Departing from the observation that the Penrose limit of AdS_3 x S^3 is a group contraction in the sense of Inonu and Wigner, we explore the relation between the symmetric D-branes…
An illustrated guide to D-branes in SU(3)
Sonia Stanciu
We give a systematic account of symmetric D-branes in the Lie group SU(3). We determine both the classical and quantum moduli space of (twisted) conjugacy classes in terms of the (…
A geometric approach to D-branes in group manifolds
Sonia Stanciu
This is a brief review of some recent results on the geometric approach to symmetric D-branes in group manifolds, both twisted and untwisted. We describe the geometry of the gluing…
D-brane charge, flux quantisation and relative (co)homology
J. M. Figueroa-O'Farrill, S. Stanciu
We reconsider the problem of U(1) flux and D0-charge for D-branes in the WZW model and investigate the relationship between the different definitions that have been proposed recent…
A note on D-branes in group manifolds: flux quantisation and D0-charge
Sonia Stanciu
We show that a D-brane in a group manifold given by a (twisted) conjugacy class is characterised by a gauge invariant two-form field determined in terms of the matrix of gluing con…
D-branes in AdS_3xS^3xS^3xS^1
JM Figueroa-O'Farrill, S Stanciu
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 determ…
D-branes in group manifolds
S Stanciu
In this paper we re-examine the geometric interpretation of gluing conditions in WZW models and the possible D-brane configurations that they give rise to. We show how the boundary…
More D-branes in the Nappi-Witten background
JM Figueroa-O'Farrill, S Stanciu
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 eucli…
D-branes in an AdS_3 background
Sonia Stanciu
We study the possible D-brane configurations in an AdS_3 x S^3 x T^4 background with a NS-NS B field. We use its WZW model description and the boundary state formalism, and we anal…
Planes, branes and automorphisms: II. Branes in motion
BS Acharya, JM Figueroa-O'Farrill, B Spence +1
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 th…
D-branes in curved spacetime: Nappi-Witten background
Sonia Stanciu, Arkady Tseytlin
We find exact D-brane configurations in the Nappi-Witten background using the boundary state approach and describe how they are related by T-duality transformations. We also show t…
D-branes in Kazama-Suzuki Models
Sonia Stanciu
We investigate boundary states of D-branes wrapped around supersymmetric cycles in Kazama--Suzuki models. We show that the geometry of the D-branes corresponds to a generalisation…
Nonreductive WZW models and their CFTs, II: N=1 and N=2 cosets
Jose M Figueroa-O'Farrill, Sonia Stanciu
In hep-th/9506151 we started a programme devoted to the systematic study of the conformal field theories derived from WZW models based on nonreductive Lie groups. In this, the seco…
N=1 and N=2 cosets from gauged supersymmetric WZW models
Jose M Figueroa-O'Farrill, Sonia Stanciu
We present a derivation of the N=1 and N=2 superconformal coset constructions starting from a supersymmetric WZW model where a diagonal subgroup has been gauged. We work in the gen…
On the structure of symmetric self-dual Lie algebras
JM Figueroa-O'Farrill, S Stanciu
A finite-dimensional Lie algebra is called (symmetric) self-dual, if it possesses an invariant nondegenerate (symmetric) bilinear form. Symmetric self-dual Lie algebras have been s…
Nonreductive WZW models and their CFTs
JM Figueroa-O'Farrill, S Stanciu
We study two-dimensional WZW models with target space a nonreductive Lie group. Such models exist whenever the Lie group possesses a bi-invariant metric. We show that such WZW mode…
Equivariant Cohomology and Gauged Bosonic sigma-Models
J M Figueroa-O'Farrill, S Stanciu
We re-examine the problem of gauging the Wess-Zumino term of a d-dimensional bosonic sigma-model. We phrase this problem in terms of the equivariant cohomology of the target space…
Gauged Wess-Zumino terms and Equivariant Cohomology
J M Figueroa-O'Farrill, S Stanciu
We summarize some results obtained on the problem of gauging the Wess--Zumino term of a d-dimensional bosonic sigma-model. We show that gauged WZ-like terms are in one-to-one corre…
Supersymmetric Integrable Hierarchies and String Theory
Sonia Stanciu
This thesis is roughly organized into two parts. The first one (the first three chapters), expository in nature, attempts to place the current work in context: at first historicall…
On the Supersymmetric BKP-Hierarchy
Eduardo Ramos, Sonia Stanciu
We prove that the supersymmetric BKP-hierarchy of Yu (SBKP_2) is hamiltonian with respect to a nonlinear extension of the N=1 Super-Virasoro algebra (W_SBKP) by fields of spin k, w…
Nonsemisimple Sugawara Constructions
J. M. Figueroa-O'Farrill, S. Stanciu
By a Sugawara construction we mean a generalized Virasoro construction in which the currents are primary fields of conformal weight one. For simple Lie algebras, this singles out t…
Additional Symmetries of Supersymmetric KP Hierarchies
Sonia Stanciu
We investigate the additional symmetries of several supersymmetric KP hierarchies: the SKP hierarchy of Manin and Radul, the hierarchy, and the Jacobian SKP hierarch…
New Supersymmetrizations of the Generalized KdV Hierarchies
J. M. Figueroa-O'Farrill, S. Stanciu
Recently we investigated a new supersymmetrization procedure for the KdV hierarchy inspired in some recent work on supersymmetric matrix models. We extend this procedure here for t…
On a New Supersymmetric KdV Hierarchy in Quantum Supergravity
J. M. Figueroa-O'Farrill, S. Stanciu
Recently a new supersymmetric extension of the KdV hierarchy has appeared in a matrix-model-inspired approach to quantum supergravity. Here we prove that this hierarchy is…