Tracking Down The Standard Model With Gravity In Multi-Fold Universes
Authors: Maes Stephane 
Published: July 2022

In a multi-fold universe, gravity emerges from Entanglement through the multi-fold mechanisms. As a result, gravity-like effects appear in between entangled particles that they be real or virtual. Long range, massless gravity results from entanglement of massless virtual particles. Entanglement of massive virtual particles leads to massive gravity contributions at very smalls scales. Multi-folds mechanisms also result into a spacetime that is discrete, with a random walk fractal structure and non-commutative geometry that is Lorentz invariant and where spacetime nodes and particles can be modeled with microscopic black holes. All these recover General relativity at large scales and semi-classical model remain valid till smaller scale than usually expected. Gravity can therefore be added to the Standard Model. This can contribute to resolving several open issues with the Standard Model without new Physics other than gravity. These considerations hints at a even stronger relationship between gravity and the Standard Model.Besides having multi-folds, and gravitons, living in AdS(5) tangent to the multi-fold universe spacetime, spacetime points and particles or field locally encounter additional 3D spatial dimensions due to the multi-folds used by paths of entangled particles. It provides an apparent local 7D manifold embedding the multi-fold universe spacetime. Modern unconstrained 5+D Kaluza-Klein (KK) empty (flat) space models, i.e. without compactification constraints of the additional spatial dimensions in 7D, allow the recovery from the 7D vacuum of gravity and electromagnetism as well as Yang Mills and the symmetries needed for strong and weak interactions. They also provide geometrical sources for masses, charges, wave functions, equations, quantum behavior and quantum vacuum. Unfortunately, limitations in terms of lack of chirality and chiral fermions, as well as apparition 5th or higher order forces, have tampered the enthusiasm just as what happened with earlier KK models. Within a multi-fold universe, we can recover chiral fermion and chiral symmetry breaking, due to gravity, of Electroweak and Strong interactions, while avoiding 5th (and more) forces, magnetic monopoles (because not relying on compactification), undue precessions, loss of conservation laws or supersymmetry. Such considerations do not work in conventional induced space-time-matter theories. In other words, the Standard Model seems to be induced purely from gravity and spacetime geometries in a multi-fold universe. Explanations for masses, charges and quantum behaviors (wave functions, equations QFT loops and of course entanglement and quantum gravity emerging from entanglement) can be hinted, albeit not (yet) quantified, in multi-fold universes. This is quite an achievement putting multi-fold mechanisms, themselves also physically clarified in terms of mapping, on par with, if not ahead of, other Quantum Gravity, GUTs and ToEs candidates of Unification of Physics. The analysis of 7D empty universes vs. AdS(5) both surrounding any spacetime points, in a multi-fold universe, also illustrates the implications of dualities and the differences between multi-fold universes with additional dimensions vs. the universe where superstrings, supersymmetry, supergravity and M-theory seem to live and matter.Our analysis also discusses, for multi-fold universes, if General Relativity (GR) governs physics in AdS(5) (plus additional dimensions) and the resulting implications for the ADS/CFT correspondence and ER=EPR conjectures as well as for superstrings.Additional considerations in terms of what entanglement may mean for the associated microscopic black holes are also discussed.