Quantum correlations in the temporal CHSH scenario

Understand

We consider a temporal version of the CHSH scenario using projective measurements on a single quantum system.

• It is known that quantum correlations in this scenario are fundamentally more general than correlations obtainable with the assumptions of macroscopic realism and non-invasive measurements.
• In this work, we also educe some fundamental limitations of these quantum correlations.
• One result is that a set of correlators can appear in the temporal CHSH scenario if and only if it can appear in the usual spatial CHSH scenario.