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I would like to know how much conjectures about the space-time's being discrete are valid. There is a short article here:

https://www.meta-religion.com/Physics/Quantum_physics/is_space.htm

One reason mentioned here is that current physical models suggest that the information content of any finite space-time region is finite. Therefore, Spacetime cannot be continuous because this way the position of particles might contain infinite information. How much is this correct?

Generally what do people mean when they say that the spacetime is quantized? Do they mean that it is a discrete grid with certain allowed positions?

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marked as duplicate by AccidentalFourierTransform, Ben Crowell, user191954, John Rennie quantum-mechanics Oct 20 '18 at 5:09

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  • $\begingroup$ These are nontrivial questions (theoretically, phenomenologically and experimentally) and no one knows the answer. It's an ongoing research topic. $\endgroup$ – Avantgarde Oct 19 '18 at 23:43