5 research outputs found
A quick guide to defect orbifolds
We provide a lightning review of the construction of (generalised) orbifolds
[arXiv:0909.5013, arXiv:1210.6363] of two-dimensional quantum field theories in
terms of topological defects, along the lines of [arXiv:1307.3141]. This
universal perspective has many applications, some of which we sketch in the
examples of 2d Yang-Mills theory, Landau-Ginzburg models, and rational CFT.Comment: 11 pages, contribution to the String-Math 2013 proceeding
D-brane Moduli Spaces and Superpotentials in a Two-Parameter Model
We study D2-branes on the K3-fibration P^4_(11222)[8] using matrix
factorizations at the Landau-Ginzburg point and analyze their moduli space and
superpotentials in detail. We find that the open string moduli space consists
of various intersecting branches of different dimensions. Families of D2-branes
wrapping rational curves of degree one intersect with bound state branches. The
influence of non-toric complex structure deformations is investigated in the
Landau-Ginzburg framework, where these deformations arise as bulk moduli from
the twisted sectors.Comment: 35 pages, 2 figures, reference adde