منابع مشابه
Stringy Domain Walls of N = 1 , D = 4 Supergravity
We examine domain wall solutions of N = 1, D = 4 supergravity which preserve half of the supersymmetry and arise from Euclidean M2-brane instantons on M5-branes wrapping associative 3-cycles of G 2-holonomy manifolds. We also investigate composite solutions which break an additional half of the supersymmetry.
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We review the status of domain walls in N = 1 supergravity theories for both the vacuum domain walls as well as dilatonic domain walls. We concentrate on a systematic analysis of the nature of the space–time in such domain wall backgrounds and the special rôle that supersymmetry is playing in determining the nature of such configurations. Isotropic vacuum domain walls that can exist between iso...
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We point out that the moduli sector of the (2, 2) string compactification with its nonperturbatively preserved non-compact symmetries is a framework to study global topological defects. Based on the target space modular invariance of the nonperturbative superpotential of the four-dimensional N = 1 supersymmetric string vacua, topologically stable stringy domain walls are found. Explicit supersy...
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We study supersymmetric domain walls on S1 /Z2 orbifolds. The supergravity solutions in the bulk are given by the attractor equation associated with Calabi–Yau ~CY! spaces and have a naked space–time singularity at some uysu. We are looking for possibilities to cut off this singularity with the second wall by a stringy mechanism. We use the collapse of the CY cycle at uycu which happens before ...
متن کاملAxion-Dilaton Domain Walls and Fake Supergravity
Dynamical systems methods are used to investigate domain-wall solutions of a two-parameter family of models in which gravity is coupled to an axion, and to a dilaton with an exponential potential of either sign. A complete global analysis is presented for (i) constant axion and (ii) flat walls, including a study of bifurcations and a new exact domain-wall solution with non-constant axion. We re...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2002
ISSN: 0550-3213
DOI: 10.1016/s0550-3213(02)00067-6