# Quasi-quantum groups from Kalb-Ramond fields and magnetic amplitudes for strings on orbifolds

@article{Jureit2006QuasiquantumGF, title={Quasi-quantum groups from Kalb-Ramond fields and magnetic amplitudes for strings on orbifolds}, author={Jan-Hendrik Jureit and Thomas Krajewski}, journal={arXiv: High Energy Physics - Theory}, year={2006} }

We present the general form of the operators that lift the group action on the twisted sectors of a bosonic string on an orbifold ${\cal M}/G$, in the presence of a Kalb-Ramond field strength $H$. These operators turn out to generate the quasi-quantum group $D_{\omega}[G]$, introduced in the context of orbifold conformal field theory by R. Dijkgraaf, V. Pasquier and P. Roche. The 3-cocycle $\omega$ entering in the definition of $D_{\omega}[G]$ is related to $H$ by a series of cohomological…

## 3 Citations

### Quasi-quantum groups from strings

- Mathematics
- 2008

Motivated by string theory on the orbifold M/G in presence of a Kalb-Ramond field strength H, we define the operators that lift the group action to the twisted sectors. These operators turn out to…

### Quasi-quantum groups from strings

- Mathematics
- 2008

Motivated by string theory on the orbifold M/G in presence of a Kalb-Ramond field strength H, we define the operators that lift the group action to the twisted sectors. These operators turn out to…

### Gerbe-holonomy for surfaces with defect networks

- Mathematics
- 2008

We define the sigma-model action for world-sheets with embedded defect networks in the presence of a three-form field strength. We derive the defect gluing condition for the sigma-model fields and…

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