  One of the most important properties of quantum information, and the one
ultimately responsible for its cryptographic applications, is that it can't be
copied. That statement, however, is not completely accurate. While the
no-cloning theorem of quantum mechanics prevents quantum information from being
copied in space, the reversibility of microscopic physics actually requires
that the information be copied in time. In spacetime as a whole, therefore,
quantum information is widely replicated but in a restricted fashion. We fully
characterize which regions of spacetime can all hold the same quantum
information. Because quantum information can be delocalized through quantum
error correction and teleportation, it need not follow well-defined
trajectories. Instead, replication of the information in any configuration of
spacetime regions not leading to violations of causality or the no-cloning
principle is allowed. To demonstrate this, we answer the operational question
of exactly when the information can be summoned to a set of spacetime points,
showing how to do so efficiently using a combination of teleportation and
codeword-stabilized quantum codes. This provides a simple and complete
description of where and when a qubit can be located in spacetime, revealing a
remarkable variety of possibilities.
