Strings, Dbranes and CalabiYau compactifications
Gabriele Honecker (Mainz)
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When 
Oct 25, 2012 from 03:15 pm to 04:15 pm 
Where  Mainz, 05432 (Hilbertraum) 
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Abstract: String theories are given by 1+1 dimensional (`worldsheet') field theories, which are embedded in a 1+(D1) 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 CalabiYau threefolds lead to four dimensional supersymmetric field theories. Endpoints of open strings are confined to pdimensional planes, the `Dpbranes', 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 Dbranes) and why CalabiYau manifolds (and special Lagrangian cycles) are of interest to theoretical physicists.