  In the last two decades the Anti-de Sitter/Conformal Field Theory
correspondence (AdS/CFT) has emerged as focal point of many research interests.
In particular, it functions as a stepping stone to a still missing full quantum
theory of gravity. In this context, a pivotal question is if and how
cosmological physics can be studied using AdS/CFT. Motivated by string theory,
braneworld cosmologies propose that our universe is a four-dimensional membrane
embedded in a bulk five-dimensional AdS spacetime. We show how such a scenario
can be microscopically realized in AdS/CFT using special field theory states
dual to an "end-of-the-world brane" moving in a charged black hole spacetime.
Observers on the brane experience cosmological physics and approximately
four-dimensional gravity, at least locally in spacetime. This result opens a
new path towards a description of quantum cosmology and the simulation of
cosmology on quantum machines.
