  Informed by a quantum information perspective, we interpret cosmological
expansion of space as growing entanglement between underlying degrees of
freedom. In particular, we focus on inflationary cosmology, which, while being
a successful empirical paradigm for early universe physics, is riddled with
ambiguities when one traces its quantum mechanical origins. We show, by
deriving a modified cosmological continuity equation, that by properly
accounting for new degrees of freedom being added to space by quantum
entanglement, inflation can naturally be driven by quantum mechanics without
having to resort to novel, unknown physics. While we explicitly focus on
inflation in our discussion, we expect this approach to have possible broad
implications for cosmology and quantum gravity.
