منابع مشابه
D-branes in Gepner Models
We discuss D-branes from a conformal field theory point of view. In this approach, branes are described by boundary states providing sources for closed string modes, independently of classical notions. The boundary states must satisfy constraints which fall into two classes: The first consists of gluing conditions between left-and right-moving Virasoro or further symmetry generators, whereas th...
متن کاملSupersymmetric Orientifolds of Gepner Models
Supersymmetric orientifolds of four dimensional Gepner Models are constructed in a systematic way. For all levels of the Gepner model being odd the generic expression for both the A-type and the B-type Klein bottle amplitude is derived. The appearing massless tadpoles are canceled by introducing appropriate boundary states of Recknagel/Schomerus(RS). After determining the Möbius strip amplitude...
متن کاملD - branes in Gepner models
We discuss D-branes from a conformal field theory point of view. In this approach, branes are described by boundary states providing sources for closed string modes, independently of classical notions. The boundary states must satisfy constraints which fall into two classes: The first consists of gluing conditions between left-and right-moving Virasoro or further symmetry generators, whereas th...
متن کاملPermutation Orientifolds of Gepner Models
In tensor products of a left-right symmetric CFT, one can define permutation orientifolds by combining orientation reversal with involutive permutation symmetries. We construct the corresponding crosscap states in general rational CFTs and their orbifolds, and study in detail those in products of affine U(1)2 models or N = 2 minimal models. The results are used to construct permutation orientif...
متن کاملOn D0-branes in Gepner Models
We show why and when D0-branes at the Gepner point of Calabi-Yau manifolds given as Fermat hypersurfaces exist.
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2010
ISSN: 0550-3213
DOI: 10.1016/j.nuclphysb.2010.07.020