Chang, Z (reprint author), Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, Fohringer Ring 6, D-80805 Munich, Germany.
Exponential regularization of orthogonal and anti-de Sitter (AdS) space is presented based on noncommutative geometry. We show that an adequately adopted noncommutative deformation of geometry makes the holography of higher dimensional quantum theory of gravity and lower dimensional theory possible. We present detailed calculations for the counting of the observable degrees of freedom of a quantum system of gravity in the bulk of noncommutative space SOq(3) and the classical limit of its boundary surface S-2. Taking the noncommutivity effect into account, we get the desired form of entropy for our world, which is consistent with the physical phenomena. associated with gravitational collapse. Conformally invariant symmetry is obtained for the equivalent theory of the quantum gravity living on the classical limit of the boundary of the noncommutative AdS space. This is the basis of the AdS/CFT correspondence in string theory.