  There has been recent interest in identifying entanglement as the fundamental
concept from which space may emerge. We note that the particular way that a
Hilbert space is decomposed into tensor factors is important in what the
resulting geometry looks like. We then propose that time may be regarded as a
variable that parameterizes a family of such decompositions, thus giving rise
to a family of spatial geometries. As a proof of concept, this idea is
demonstrated in two toy models based on Kitaev's toric code, which feature a
dynamical change of dimension and topology.
