منابع مشابه
Exact String Backgrounds from Wzw Models Based on Non-semi-simple Groups
We formulate WZW models based on a centrally extended version of the Euclidean group in d-dimensions. We obtain string backgrounds corresponding to conformal σ-models in D = d space-time dimensions with exact central charge c = d and d(d − 1)/2 null Killing vectors. By identifying the corresponding conformal field theory we show that the one loop results coincide with the exact ones up to a shi...
متن کاملGauged WZW Models
As shown by Witten the N = 1 supersymmetric gauged WZW model based on a group G has an extended N = 2 supersymmetry if the gauged subgroup H is so chosen that G/H is Kähler. We extend Witten’s result and prove that the N = 1 supersymmetric gauged WZW models over G×U(1) are actually invariant under N = 4 superconformal transformations if the gauged subgroup H is such that G/(H × SU(2)) is a quat...
متن کاملTopological Strings from WZW Models
We show that the BRST structure of the topological string is encoded in the “small” N = 4 superconformal algebra, enabling us to obtain, in a non-trivial way, the string theory from hamiltonian reduction of A(1|1). This leads to the important conclusion that not only ordinary string theories, but topological strings as well, can be obtained, or even defined, by hamiltonian reduction from WZW mo...
متن کاملGauging a Non-semi-simple Wzw Model
We consider gauged WZWmodels based on a four dimensional non-semi-simple group. We obtain conformal σ-models in D = 3 spacetime dimensions (with exact central charge c = 3) by axially and vectorially gauging a one-dimensional subgroup. The model obtained in the axial gauging is related to the 3D black string after a correlated limit is taken in the latter model. By identifying the CFT correspon...
متن کاملWzw-models in Extended Superspace
We find the complex structure on the dual of a complex target space. For N = (2, 2) systems, we prove that the space orthogonal to the kernel of the commutator of the left and right complex structures is always integrable, and hence the kernel is parametrized by chiral and twisted chiral superfield coordinates. We then analyze the particular case of SU(2) × SU(2), and are led to a new N = 2 sup...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1996
ISSN: 0550-3213
DOI: 10.1016/0550-3213(95)00587-0