Alumnae and Alumni

Daniel Krefl
Position
Project Researcher (from 2009/08/01 to 2010/09/30)
Current Affiliation
Department of Computational Biology, University of Lausanne
Junior Lecturer

URL
https://applicationspub.unil.ch/interpub/noauth/php/Un/UnPers.php?PerNum=1214744&LanCode=8&menu=coord
PHOTO

Last Update 2021/04/13

Lately, my work has been mainly concerned with extending the topological string machinery to orientifolds, that is, a combined gauging of worldsheet parity and a target-space involution. Besides the physical importance of orientifolds in superstring theories, this also leads to some new mathematics. This is because, roughly speaking, the free-energy of the orientifolded topological string is the generating function of maps from the world-sheet to targetspace, where the world-sheet may now possess boundaries and cross-caps, thus, giving a physical count of some new invariants of the target-space.


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