| DATE: |
2005-07-05 11:00 - |
| PLACE: |
Kenkyu Honkan 2F RM220 |
| TITLE: |
Algebraic classification of M-theory orbifolds |
| CONTACT: |
tango |
| SPEAKER: |
Dr. Maxime Bagnoud (Kyoto Univ.) |
| LANGUAGE: |
English |
| ABSTRACT: |
In this talk, a new method of treating orbifolds by expressing the orbifold action on the physical fields of the theory in a purely algebraic manner will be presented. Doing so, a description of the untwisted sector as an invariant subalgebra of the U-duality symmetry algebra of M-theory can be obtained, as well as a description of charged states as a nilpotent subalgebra of an Iwasawa decomposition related to a certain Satake diagram of the U-duality symmetry algebra. A description of the twisted sector as an invariant subalgebra under some algebra automorphism can also be given. A few simple examples will be treated in detail, as well as results for more physically realistic cases. |
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