The boundary state formalism and conformal invariance in off-shell string theory
نویسندگان
چکیده
منابع مشابه
The Boundary State Formalism and Conformal Invariance in Off-shell String Theory
In this note we present a generalization of the boundary state formalism for the bosonic string that allows us to calculate the overlap of the boundary state with arbitrary closed string states. We show that this generalization exactly reproduces world-sheet sigma model calculations, thus giving the correct overlap with both onand off-shell string states, and that this new boundary state automa...
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We examine the application of boundary states in computing amplitudes in offshell open string theory. We find a straightforward generalization of boundary state which produces the correct matrix elements with on-shell closed string states.
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Covariant quantization of string theories is developed in the context of conformal field theory and the BRST quantization procedure. The BRST method is used to covariantly quantize superstrings, and in particular to construct the vertex operators for string emission as well as the supersymmetry charge. The calculation of string loop diagrams is sketched. We discuss how conformal methods can be ...
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Recently a boundary string field theory that had been proposed some time ago, was used to calculate correctly the ratios of D-brane (both BPS and non-BPS) tensions. We discuss how this work is related to the boundary state formalism and open string closed string duality, and argue that the latter clarifies why the correct tension ratios are obtained in these recent calculations. e-mail: dealwis...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2003
ISSN: 1029-8479
DOI: 10.1088/1126-6708/2003/11/021