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# Eva Silverstein : An Approach to Tachyon Dynamics in Closed String Theory

The talk will begin with a review of some recent progress in non-supersymmetric string theory, motivating a careful study of such backgrounds. Many non-supersymmetric closed string theories have negative modes (``tachyons''). I will describe an approach to understanding the result of tachyon condensation using configurations in string theory of effectively negative but finite tension (such as orientifold planes and their S-duals).

**Category**: String Theory**Duration**: 01:10:07**Date**: May 17, 1999 at 4:00 PM**Views**: 16-
**Tags:**seminar, String Theory Seminar

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