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T-duality and String Alpha’ Corrections

Speaker: James Liu (University of Michigan)

Event Details

Although T-duality is an inherently stringy symmetry, it can be seen at the effective field theory level, both in the classical two-derivative action and at the alpha' corrected level.  In fact, T-duality invariance can be a powerful tool in constraining the form of the alpha' corrections.  A particularly interesting framework involves a cosmological reduction where all spatial dimensions are compactified on a torus.  The resulting system only involves the generalized metric on the torus, giving rise to a generalized geometry approach to constructing T-duality invariants.  We explore both tree-level R^2 and R^4 corrections in the cosmological reduction and highlight the role of the generalized connection with torsion in constructing higher-curvature invariants.

Oct 18, 2021
3:00 pm – 4:00 pm (CDT)
Location
MIST M108
Building / Address
Mitchell Institute for Fundamental Physics & Astronomy, College Station, Texas, 77843
Hosted By
Falk Hassler