000K  utf8
0100  391754963
1100  2004$c2004-06-22
1500  ger
2050  urn:nbn:de:gbv:27-dbt-001965-5
3000  Saueressig, Frank
4000  Topological Phase Transitions in Calabi-Yau Compactifications of M-Theory  [Saueressig, Frank]
4209  We construct five-dimensional gauged supergravity actions which describe flop and conifold transitions in M-theory compactified on Calabi-Yau threefolds. While the vector multiplet sector is determined exactly, we use the unitary Wolf spaces to model the universal hypermultiplet together with N charged hypermultiplets corresponding to winding states of M2-branes. After specifying the hypermultiplet sector the actions are uniquely determined by M-theory. As an application we consider five-dimensional Kasner cosmologies. Including the dynamics of the winding modes, we find smooth cosmological solutions which undergo flop and conifold transitions. Instead of the usual runaway behavior the scalar fields of these solutions generically stabilize in the transition region where they oscillate around the transition locus. The scalar potential thereby induces short episodes of accelerated expansion in the space-time.
4950  https://nbn-resolving.org/urn:nbn:de:gbv:27-dbt-001965-5$xR$3Volltext$534
4961  http://uri.gbv.de/document/gvk:ppn:391754963
5051  530
5550  Calabi-Yau-Mannigfaltigkeit
5550  Kompaktifizierung
5550  Superstringtheorie