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Aspects of the (0,2)-McKay Correspondence

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Date
2015
Author
Gaines, Benjamin C.
Advisor
Aspinwall, Paul S
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Abstract

We study first order deformations of the tangent sheaf of resolutions of Calabi-Yau threefolds that are of the form $\CC^3/\ZZ_r$, focusing

on the cases where the orbifold has an isolated singularity. We prove a lower bound on the number

of deformations of the tangent bundle for any crepant resolution of this orbifold. We show that this lower bound is achieved when the resolution used is the

G-Hilbert scheme, and note that this lower bound can be found using a combinatorial count of (0,2)-deformation moduli fields for

N=(2,2) conformal field theories on the orbifold. We also find that in general this minimum is not achieved, and expect the discrepancy

to be explained by worldsheet instanton corrections coming from rational curves in the orbifold resolution. We show that

irreducible toric rational curves will account for some of the discrepancy, but also prove that there must be additional

worldsheet instanton corrections beyond those from smooth isolated rational curves.

Type
Dissertation
Department
Mathematics
Subject
Mathematics
Theoretical mathematics
Theoretical physics
Deformations
Hilbert Scheme
McKay
Toric
Permalink
https://hdl.handle.net/10161/9863
Citation
Gaines, Benjamin C. (2015). Aspects of the (0,2)-McKay Correspondence. Dissertation, Duke University. Retrieved from https://hdl.handle.net/10161/9863.
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