Endowing spacetime with a minimal length
We describe a recently developed tool which enables a description of spacetime as a manifold with a Lorentz-invariant limit length built-in. This is accomplished in terms of quantities depending on two spacetime events (bitensors) and looking at two-point function, all this being well suited to embody nonlocality in the small scale. What one gets is a metric bitensor (called minimum-length metric or quantum metric, or qmetric for brief), with components singular in the coincidence limit of the two events, then capable to provide an effective finite distance in the same limit.