A Unifying Framework for Spatial and Temporal Quantum Correlations

Understand

Measurements on a single quantum system at different times reveal rich non-classical correlations similar to those observed in spatially separated multi-partite systems.

• Here we introduce a theory framework that unifies the description of temporal, spatial, and spatio-temporal resources for quantum correlations.
• We identify, and experimentally demonstrate simple cases where an exact mapping between the domains is possible.
• We then identify correlation resources in arbitrary situations, where not all spatial quantum states correspond to a process and not all temporal measurements have a spatial analogue.