"This seems very complicated at first, but it's easy to explain," continues Erdmenger. "The AdS/CFT correspondence allows us to understand difficult gravitational processes, like those that exist in the quantum world, using simpler mathematical models. At its heart is a curved spacetime, which can be thought of as a funnel. The correspondence claims that the Quantum dynamics at the edge of the funnel must correspond to the more complex dynamics within it - in a similar way to a hologram on a banknote, which generates a three-dimensional image, although it is only two-dimensional."
