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Topological defects and generalised orbifolds ... - Nils Carqueville

Topological defects and generalised orbifolds ... - Nils Carqueville

Topological defects and generalised orbifolds ... - Nils Carqueville

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L<strong>and</strong>au-Ginzburg models<br />

defect fusion: X ⊗ Y , dX⊗Y = dX ⊗ 1 + 1 ⊗ dY<br />

invisible defect:<br />

IW = (R ⊗ R) ⊕2 , dIW =<br />

�<br />

0<br />

�<br />

x − y<br />

0<br />

for n = 1, in general:<br />

IW = � � �n<br />

�<br />

(R⊗R)·θi , dIW =<br />

i=1<br />

Brunner/Roggenkamp 2007, Kapustin/Rozansky 2004<br />

W (x)−W (y)<br />

x−y<br />

n�<br />

i=1<br />

�<br />

(xi −yi)·θ ∗ �<br />

i +∂ [i]W ·θi

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