15 citations · 15 across the 1 of their papers we have counts for
6 papers
The abelian cosets of the Heisenberg group
Giuseppe D'Appollonio, Thomas Quella
In this paper we study the abelian cosets of the H(4) WZW model. They coincide or are related to several interesting three-dimensional backgrounds such as the Melvin model, the con…
The symmetric branes of the H4 WZW model
Giuseppe D'Appollonio
We review the solution of the boundary CFTs that describe the symmetric branes in the Nappi-Witten gravitational wave, namely D2 and S1 branes. The D2 branes are the twisted branes…
String amplitudes in the Hpp-wave limit of AdS3xS3
M. Bianchi, G. D'Appollonio, E. Kiritsis +1
We compute string amplitudes on pp-waves supported by NS-NS 3-form fluxes and arising in the Penrose limit of AdS3xS3xM. We clarify the role of the non-chiral accidental SU(2) symm…
Landau-Ginzburg Description of Boundary Critical Phenomena in Two Dimensions
A. Cappelli, G. D'Appollonio, M. Zabzine
The Virasoro minimal models with boundary are described in the Landau-Ginzburg theory by introducing a boundary potential, function of the boundary field value. The ground state fi…
Gravitational waves from WZW models
Giuseppe D'Appollonio
A brief review is given of the recent solution of a non-compact CFT describing a NS-supported pp-wave background. We will first explain how to compute the three and four-point corr…
Aspetti non perturbativi della Teoria delle Stringhe
G. D'Appollonio
Unabridged version of the Thesis presented to the University of L' Aquila, in partial fulfillment of the requirements for the ``Laurea'' degree in Physics, October 1998. Work carri…