We present a comprehensive analysis of branes in the Euclidean 2D black hole (cigar). In particular, exact boundary states and annulus amplitudes are provided for D0-branes which are localized at theâ€¦ (More)

I generalize the Knizhnikâ€“Zamolodchikov equations to cor relators of spectral flowed fields in AdS3 string theory. If spectral flow is preserved or violated by on e unit, the resulting equations areâ€¦ (More)

We prove that arbitrary correlation functions of the H 3 -WZNW model on a sphere have a simple expression in terms of Liouville theory correl ation functions. This is based on the correspondenceâ€¦ (More)

We prove that arbitrary correlation functions of the H 3 -WZNW model on a sphere have a simple expression in terms of Liouville theory correl ation functions. This is based on the correspondenceâ€¦ (More)

We find the boundary action for Euclidean AdS2 D-branes inH + 3 . This action is consistent with the D-branesâ€™ symmetries and with the H 3 -Liouville relation for disc correlators. It can be used forâ€¦ (More)

We find non-rational conformal field theories in two dimensi ons, which are solvable due to their correlators being related to correlators of Lio uv lle theory. Their symmetry algebra consists of theâ€¦ (More)

We consider the Born-Infeld action for symmetry-preserving, orientable D-branes in compact group manifolds. We find classical solutions that obey the flux quantization condition. They correspond toâ€¦ (More)

We present some preliminary investigations about the AdS 2 Ã—S 2 D3-branes in AdS 3 Ã—S 3. We analyse the quadratic fluctuations of Diracâ€“Bornâ€“Infeld action around a given semi-classical D-braneâ€¦ (More)

We compute the density of open strings stretching between AdS2 branes in the Euclidean AdS3. This is done by solving the factorization constraint of a degenerate boundary field, and the result isâ€¦ (More)

We study D3-branes in an NS5-branes background defined by an arbitrary 4d harmonic function. Using a gauge-invariant formulation of Born-Infeld dynamics as well as the supersymmetry condition, weâ€¦ (More)