Physicists Propose Extra Temporal Dimension Framework to Explain Quantum Entanglement
A new theoretical paper posted to arXiv derives a (3,2)-dimensional spacetime framework — three spatial dimensions plus two time dimensions — as a proposed dynamical mechanism for quantum entanglement's nonlocal correlations. The work extends a prior phenomenological proposal by grounding it in bulk geometry, using warped-product metrics and five-dimensional vacuum Einstein equations to uniquely fix the geometry. If correct, the framework makes a concrete, falsifiable prediction about cross-pair correlations between independent Bell pairs that could be tested with existing photonic technology.
Researchers led by Prof. Marco Pettini have submitted a 34-page preprint to arXiv proposing that quantum entanglement's famously puzzling nonlocal correlations are mediated through an extra temporal dimension, yielding a (3,2)-dimensional spacetime — three spatial plus two time dimensions. Unlike an extra spatial dimension, which the authors show cannot provide an effective superluminal shortcut on the brane, an extra time dimension allows a massless bulk field to propagate causally and produce equal-time correlations at arbitrarily large separations via zero-energy null geodesics, without enabling controllable faster-than-light signaling. The five-dimensional vacuum Einstein equations, combined with Z₂ symmetry, uniquely determine the warp factor of the geometry, leaving no free parameters. The framework extends the Bohm–Bub collapse model to bipartite entangled systems by replacing the abstract hidden variable with a brane-projected bulk field, recovering Born rule statistics through averaging over an equivariant ensemble. A key falsifiable prediction distinguishes this model from standard quantum mechanics: when two independent Bell pairs are present, the bulk field sourced by one pair should induce a cross-pair correlation in the other, scaling as the square of the ratio of intra-pair to inter-pair separation, a signal the authors claim is accessible with current photonic Bell-test experiments.
What's missing
As a theoretical preprint, the paper has not yet undergone peer review. Key open questions include whether the (3,2)-dimensional framework is consistent with all existing experimental constraints on Lorentz invariance and causality, how the equivariant ensemble assumption is physically justified, and whether the predicted cross-pair correlation magnitude would be large enough to be distinguished from noise in realistic photonic experiments. The authors do not appear to address potential conflicts with no-go theorems (e.g., Malament's theorem) that constrain relativistic hidden-variable theories.
What different sources said
- arXiv physicsCenter
Quantum Entanglement Beyond Kinematics: A Dynamical Hypothesis in (3,2)-Dimensional Spacetime
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