## A note on the two point function on the boundary of AdS spacetime    [PDF]

L. Ortíz
We calculate by a new way the two point function on the boundary of AdS spacetime in 1+2 dimensions for the conformal real scalar field. The result agrees, module a multiplicative constant, $\frac{1}{\pi}$, with the answer provided by the Boundary-limit Holography and Witten recipe. This is done in Poincar\'{e} coordinates. The basic ingredients of this new method are conformal techniques, quantum fields defined on a half of Minkowski spacetime and a limit inspired by the Boundary-limit Holography.
View original: http://arxiv.org/abs/1307.2511