The cost of violating Bell inequalities under a causal temporal worldview

Vortrag

Bell inequalities are rooted in a realist, causal worldview. Faced with experimentally observed violations of Bell inequalities, a causal explanation may be pursued based on violations of the locality assumption, the free choice assumption (sometimes called the measurement independence assumption) or the no-retro-causality assumption. We investigate the extent to which one of these assumptions needs to be relaxed for the other assumptions to hold at all costs by computing well-defined measures of violation. As a part of an ongoing project, we seek to extend our work in arXiv:2105.09037 to investigate the concept of retro-causality with the view to give a comprehensive quantitative treatment of violations of those three assumptions on an equal footing. This aims to advance the foundational debate and stimulate deeper discussion to what extent these three concepts are interchangeable in explaining observed correlations under a standard causal view of the world.