Abstract
We analyze the ground states of a two-dimensional sigma-model whose target space is an elliptically fibered K 3, with the sigma-model compactified on S 1 with boundary conditions twisted by a duality symmetry. We show that the Witten index receives contributions from two kinds of states: (i) those that can be mapped to cohomology with coefficients in a certain line bundle over the target space, and (ii) states whose wavefunctions are localized at singular fibers. We also discuss the orbifold limit and possible connections with geometric quantization of the target space.
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ArXiv ePrint: 1211.4179
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Ganor, O.J., Jue, S. & McCurdy, S. Ground states of duality-twisted sigma-models with K 3 target space. J. High Energ. Phys. 2013, 17 (2013). https://doi.org/10.1007/JHEP02(2013)017
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DOI: https://doi.org/10.1007/JHEP02(2013)017