Symmetry breaking boundaries II. More structures; Examples

被引：55

作者：

Fuchs, J ^{[1
]}

Schweigert, C ^{[1
]}

机构：

[1] ETH Honggerberg, Inst Theoret Phys, CH-8093 Zurich, Switzerland

来源：

NUCLEAR PHYSICS B | 2000年 / 568卷 / 03期

关键词：

boundary conditions; conformal field theory; simple currents; symmetry breaking;

D O I：

10.1016/S0550-3213(99)00669-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Various structural properties of the space of symmetry breaking boundary conditions that preserve an orbifold subalgebra are established. To each such boundary condition we associate its automorphism type. We show that correlation functions in the presence of such boundary conditions are expressible in terms of twisted boundary blocks which obey twisted Ward identities. The subset of boundary conditions that share the same automorphism type is controlled by a classifying algebra, whose structure constants are shown to be traces on spaces of chiral blocks. T-duality on boundary conditions is not a one-to-one map in general. These structures are illustrated in a number of examples. Several applications, including the construction of non-BPS boundary conditions in string theory, are exhibited. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：543 / 593

页数：51

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