Boundary action of the H3+ model

Understand

We find the boundary action for Euclidean AdS2 D-branes in H3+.

• This action is consistent with the D-branes' symmetries and with the H3+-Liouville relation for disc correlators.
• It can be used for performing free-field calculations in the H3+ model with boundaries.
• We explicitly perform the Coulomb-like integrals which appear in the free-field calculation of the bulk one-point function, and find agreement with previously known conformal bootstrap results.