The holographic principle is a concept that arises from theoretical physics, particularly in the context of string theory and black hole physics. It suggests that the information within a region of space can be encoded on its boundary rather than being distributed throughout its volume. In other words, a physical theory in a certain number of dimensions can be fully described by a theory in one fewer dimension.
AdS/CFT correspindence
In the context of black holes, the holographic principle proposes that the description of physics inside a black hole can be represented by physics on the event horizon, which is a two-dimensional surface. This idea is supported by the AdS/CFT correspondence, a specific realization of the holographic principle, which relates certain gravitational phenomena in a higher-dimensional anti-de Sitter (AdS) space to a quantum field theory living on its boundary.
Dispensing with gravity or not?
The most popular view is that , while the holographic principle has provided valuable insights into the nature of gravity and the behavior of black holes, it doesn't "dispense" with gravity but rather offers a different perspective on its underlying nature.
However, if real is the 2d and holographic tgecrest, gravity is not real bt holographic effect
No, it doesn't. And the statements made in bulk of the text to the question are wrong.
In any gravitational theory the information about its states can only be encoded on its boundary-that was known already. That's not what the correspondence is about.
The AdS/CFT correspondence implies that a classical gravitational theory in anti-de Sitter spacetime (i.e. with negative cosmological constant) is dual to a quantum field theory on its boundary (that has one dimension less) that is conformal and the correspondence between states in both theories is defined in a certain quite precise way. The reason this is useful is that it can be shown that the so-called ``near horizon geometry'' of a class of black holes known as ``extremal black holes'' is described as the product of an anti-de Sitter spacetime and of a compact manifold. The correspondence then allows the identification of the microstates of such black holes, when these can be resolved, with the states of the conformal field theory.
To read this article might help you. This article published on UK journal Article The Mythos of Gravity Or (Newtonian and Einsteinian Gravity is a Myth)
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