Abstract
Cosmology is the study of the origin and evolution of the universe – the one we all love and inhabit. In this essay, however, I argue that the basic assumption of a single universe shared by multiple observers is wrong. Synthesizing the implications of black hole radiation, horizon complementarity, dark energy, observations of the cosmic microwave background and quantum logic, I argue that moving toward a true theory of quantum gravity will require us to give up the notion that we all share the same universe. Instead, I argue, each observer has their own universe, which constitutes a complete and singular reality.
Amanda Gefter