Why don't Quantum Mechanics and gravity work together?

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[kacperlepper]

[Flashcard] The nature of space seems to be totally different on macroscopic ("gentle") and microscopic ("chaotic") level

[wefinishthisnow]

And yet asymptotically safe gravity correctly predicted the mass of the Higgs boson amongst other correct predictions (that would have been correct except we had already measured them in other ways) while string theory continues to move the goalposts as the predicted particles aren't discovered by the LHC.

[Domispitaletti]

Not if you think about space as an emergent "thing". Like a real object. Same way a cloud of hydrogen atoms is a real classic object, not a quantum system.

So instead of trying to make gravity a quantum system, lets think about it(gravity) as an emergent object that is result of decoherence in the quantum domain. Like everything else in the universe?

[MartinBraonain]

Such a great explanation for the masses (me)

[invin]

Very interesting explanation. I'd never heard it put quite like that before.

[kokoronai]

This is one of several problems between them. GR uses a relativistic view of time, whereas QM use an absolute view; the two concepts are completely antithetical to each other.

[Mirracle]

Oh, quantum mechanics and gravity both “work” simultaneously, that’s for sure! Quantum mechanics is an explanation of some aspects of things that are the size of electrons and photons. Gravity is the name for the force that is exerted on your body by Planet Earth, which prevents your body from floating away from the surface of Earth. There are trillions of trillions of electrons in your body and quantum mechanics explains some aspects of their characteristics and the theory of gravity explains, in detail, the phenomenon we call gravity. There are A LOT of physical phenomena in the physical universe and A LOT of scientific theories, each of which does a good job at explaining various aspects or properties of the physical universe

[sumitparida]

If the space is real and if it's made of some particle then the particles are vibrates( according to string theory).so the vibration is almost negligible for the big scale like ( Einstein's space).but in the quantum level we found those vibration.what is contradiction here?? 🤔🤔

[primodernious]

there is so much imaginary construct is used as framework for modern theories that are practially impossible to test.

[Tankounet]

To be honest you didn't explain anything at all. I still don't get what doesn't work between the two..

[venkateshbabu]

A stone has greater momentum than a feather based on packages and ratio of free to full. So quantum gravity is extremely weak at higher levels, than lower.

[vanikaghajanyan]

In 1907 Einstein started with the classical equivalence principle (gravity/inertia), but soon modified it: gravity suddenly "became equivalent" to the curvature of 4-space, and was replaced by it.

[redchris]

So, it's like the difference between a chihuahua and a larger dog

[kennethchow]

There is no difference between general relativity and quantum mechanics. We only perceive motion of macroscopic matter, i.e. gravity, to be different from the motion of microscopic quanta, i.e. quantum mechanics because they occur in different phase spaces.

[tominator]

Gravity is a very very very weak weak weak force compared to the other forces, so it's very very hard, essentially impossible to measure at quantum scales.

[enlongchiou]

Inside Quantum black hole of proton can tame wild space time, united QM with GR.