The type IIA flux potential, 4-forms and Freed-Witten anomalies
The type IIA flux potential, 4-forms and Freed-Witten anomalies
We compute the full classical 4d scalar potential of type IIA Calabi-Yau orientifolds in the presence of fluxes and D6-branes. We show that it can be written as a bilinear form $V = Z^{AB} \rho_A\rho_B$, where the $\rho_A$ are in one-to-one correspondence with the 4-form fluxes of the 4d effective …