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Strings, D-branes and Calabi-Yau compactifications

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Gabriele Honecker (Mainz)

  • SFB-Kolloquium
When Oct 25, 2012
from 03:15 pm to 04:15 pm
Where Mainz, 05-432 (Hilbertraum)
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Abstract: String theories are given by 1+1 dimensional (`worldsheet') field theories, which are embedded in a 1+(D-1) dimensional `target' spacetime. Quantisation of the theory plusupersymmetry (=relation among bosonic and fermionic fields) constrains the target spacetime to be ten dimensional. Compactifications of six dimensions on Calabi-Yau threefolds lead to four dimensional supersymmetric field theories. Endpoints of open strings are confined to p-dimensional planes, the `Dp-branes', within the target spacetime and provide gauge degrees of freedom. This talk aims at providing a brief introduction into the basic concepts of string theory (and D-branes) and why Calabi-Yau manifolds (and special Lagrangian cycles) are of interest to theoretical physicists.