Abstract
An exoflop occurs in the gauged linear σ-model by varying the Kähler form so that a subspace appears to shrink to a point and then reemerge “outside” the original manifold. This occurs for K3 surfaces where a rational curve is “flopped” from inside to outside the K3 surface. We see that whether a rational curve contracts to an orbifold phase or an exoflop depends on whether this curve is a line or conic. We study how the D-brane category of the smooth K3 surface is described by the exoflop and, in particular, find the location of a massless D-brane in the exoflop limit. We relate exoflops to noncommutative resolutions.
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Aspinwall, P.S. Exoflops in two dimensions. J. High Energ. Phys. 2015, 104 (2015). https://doi.org/10.1007/JHEP07(2015)104
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DOI: https://doi.org/10.1007/JHEP07(2015)104