Quantum Physics comes with an instantaneous action at a distance. A simultaneity. I call it the QI, the Quantum Interaction.
This simultaneity, this action at a distance, has baffled Relativity enthusiasts. See “Taming The Quantum Spooks”.
According to Einsteinian lore, one cannot have such an “instantaneous” interaction, it would contradict “Relativity”. (From my point the interaction is not instantaneous, just more than 10^10 c, that is 10^10 the speed of light, at least.)
Jules Henri Poincaré asserted the Principle of Relativity (1904) and demonstrated that, supposing that the speed of light was always constant, one could get all the equations of Special Relativity. Then Einstein, opportunistically jumping on the immensely famous Poincaré’s work, asserted that the Frenchman’s work showed that the speed of light was constant (whereas a more cautious Poincaré asserted earlier that, considering that the speed of light was always found experimentally to be constant, one should view that as a law of physics). Of course, Einstein did not quote the French, as he was a good Swabian (and not a good European), keen to ride, as his mentor Planck was, Prussian fascism.
Poincaré knew very well Lorentz’s Local Time theory, which he had helped established, in the preceding quarter of a century. However, Jules Henri still believed in Absolute Time (Einstein did not).
Why to believe in Absolute Time? Poincaré did not wax lyrical on the subject. He actually said nothing (contrarily to Nobel laureate Bergson twenty years later, who violently contradicted Einstein). Nor did any physicist, in the meantime (110 years), dare defend Absolute Time (we have lived in an Einstein terror regime!) But this what Quantum Physics quietly does and what I will now dare to do (if I can contradict professional Salafists, I surely can dare to contradict professional physicists).
Suppose we have an absolute reference frame. Bring a light clock there, at rest, call that time: Absolute time. One can slow transport clocks (say using chemical rockets, and taking 100,000 years to get to Proxima Centauri) all over the universe, establishing UNIVERSAL TIME. Relativistic effects depend upon vv/cc. The square of speed, divided by the square of the speed of light c. If v/c is small, vv/cc is even much smaller, and negligible. (Poincaré showed this first.)
So is there an absolute reference frame? Sure. That frame is the one steady relative to distance pulsars, quasars, distant galaxies, etc. (no rotation) and steady relative to the Cosmological Background Radiation. Then one can talk about simultaneity, absolute time, and thus instantaneous interaction at a distance.
(This is one approach; there is another approach of mine, more mathematical, using the fact a manifold of dimension n can be embedded in one of dimension 2n +1 (Whitney). Or then one can use the celebrated Nash’ embedding theorem.)
There is no contradiction of Absolute Time theory, or should we say, possibility, with Local Time Theory (LTT). LTT is about light clocks. Relativity is about light clocks. Yet we know of other interactions… plus the QUANTUM INTERACTION.
BTW, in “General Relativity”, “Einstein’s theory of gravitation”, the speed of light is not constant. Even Einstein recognized this.
Conclusion? One can profitably consider Ian Miller’s “Dark Energy and Modern Science“. Even physicists can believe what they believe in, on the most important fundamentals, because it is fashionable, a rite one has to believe in, so that one can become an initiated member of the tribe. And the more absurd the belief, the better.