Imbedding nonlocality in a relativistic chronology

An alternative description imbedding nonlocality in a relativistic chronology is proposed. It is argued that vindication of Quantum Mechanics in experiments with moving beam-splitters would mean that there is no real time ordering behind the nonlocal correlations PACS numbers : 03.65.Bz, 03.30.+p, 03.67.Hk, 42.79.J The relationship between Quantum Mechanics and Relativity has been object of vast analysis since John Bell showed that: a) if one only admits relativistic local causality (causal links with v ≤ c), the correlations occurring in two-particle experiments should fulfill clear locality conditions (“Bell’s inequalities”), and b) for these experiments Quantum Mechanics bears predictions violating such locality criteria (“Bell’s theorem”) [1]. Belltype experiments conducted in the past two decades, in spite of their loopholes, suggest a violation of local causality: statistical correlations are found in space-like separated detections; violation of Bell’s inequalities ensure that these correlations are not pre-determined by local events. Nature seems to behave nonlocally, and Quantum Mechanics predicts well the observed distributions. Nevertheless, nonlocality (“Bell influences”) cannot be used for faster-than-light communication. Nonlocal correlations cannot just appear by chance: they require an ordering of the events, causality in some sense. But we use to think about causality as related to some temporal sequence. Therefore, also taking nonlocality for granted, the important question remains: is there a time ordering behind the nonlocal correlations? Bohm’s theory proposes to imbed Quantum Mechanics in a preferred frame or absolute time, in which one event is caused by some earlier event [2]. The theory does not make predictions conflicting with Quantum Mechanics but is rather a particular interpretation of it. However, it does not tell us how to trace this frame [1], so that one sees no mean to decide whether the bohmian “quantum ether” has any physical reality at all. Recent work shows that it is possible to imbed nonlocality in a real relativistic time ordering, providing one gives up Quantum Mechanics in a new type of experiments involving moving devices. This happens within Multisimultaneity, a nonlocal description using many frames to establish the cause-effect links [3, 4]. More specifically these frames are supposed to be those of the [email protected] l2:ω2+ωd (a) Source S CD20 CD30 CD10 D l1 l2 s s φ2 φ1 Pump S2 Pump S1