Can a graviton pull another graviton?

[menniandscience]

thanks

 

[jpreed]

Wow, interesting question.

 

[humanino]

Certainly yes : a graviton couples to energy-momentum, gravitons carry energy momentum, so gravitons couple to gravitons. Of course, it's difficult to tell what's going on at high energy, but in the infrared, we are pretty confident that we know graviton-graviton scattering.
Infrared behavior of graviton-graviton scattering

Also, if you have access : R. Feynman "Quantum theory of gravitation", Acta Physica Polonica vol XXIV (1963) Fasc 6 (12)

 

[Vanadium 50]

Humanino's correct - a graviton can attract gravitons.

 

[menniandscience]

if so, then it can *not* be that the gravity of objects, let's say the Earth gravity, will be symmetrically, but zones of extreme gravity and zones of none or at least very low gravity. and balls of billions of gravitones will wander in space attracting whatever in their path back to the object they left. is that true?

 

[Tac-Tics]

Isn't this phenomenon what messes up the renormalization of gravity?

 

[Naty1]

Yes. Gravity is unique with regard to self interaction and somehow Einstein had that much figured out when he developed general relativity. That self interaction was one factor that complicated his formulation.

Gravity atttacts ALL ordinary matter (and all forms of energy equivalence, including gravitons). Nothing escapes the effects of gravity. Not even time. Not heat.

It's a key feature that sets gravity apart from the other forces: strong,weak, electromagnetic.

Anybody know if anybody has developed "gravitons" icw with dark matter or dark energy??

 

[menniandscience]

so how einstein solve it? how come the gravity around earth, i presume, symmetrically?
i can think about something: graviton will set free only when two masses are close enough to make a certain tension, otherwise, just like power lines of a magnet which curve around it as long as it does not close to anyother magnet, and so graviton will keep it self a part of the others [gravitones] by going back and forth between the particle of mass that prodice\emitted it.

 

[Vanadium 50]

A static gravitational field is not in an eigenstate of graviton number. Discussing "what the gravitons do" when discussing static gravitational fields is not something that is well-defined.

 

[menniandscience]

well then, in dynamic gravitational field, are there

zones of extreme gravity and zones of none or at least very low gravity. and balls of billions of gravitones will wander in space attracting whatever in their path back to the object they left. is that true?

 

[Naty1]

I've read, and don't quote these figures, they are for illustration only: that whereas perhaps a 100 watt light bulb would give off trillions upon trilions of photons per second, a typical atomic particle might exchange one gravition...and that over a period substantially longer than the life of the universe to date...

 

[xiaomaclever]

thanks

Certainly yes. The interaction between gravitons should give the gravitational energy,which should be contained in the RHS of Einstein field equation. But until now we do not have the satisfactory local definition of gravitational energy-momentum tensor in the frame of Einstein's GR.

 

[Vanadium 50]

Gravity is unique with regard to self interaction

No it's not. Gluons do too.

 

[Vanadium 50]

well then, in dynamic gravitational field, are there

zones of extreme gravity and zones of none or at least very low gravity. and balls of billions of gravitones will wander in space attracting whatever in their path back to the object they left. is that true?

No, it's not.

 

[Vanadium 50]

I've read, and don't quote these figures, they are for illustration only: that whereas perhaps a 100 watt light bulb would give off trillions upon trilions of photons per second, a typical atomic particle might exchange one gravition...and that over a period substantially longer than the life of the universe to date...

Well, whatever you are reading is wrong - or at least grossly oversimplified. It's not even comparing the right things - real photons from a light bulb are not analogous to virtual gravitons from a static field.

Static gravitational fields are not in an eigenstate of graviton number. You simply cannot say "this field is stronger so there must be more gravitons".

 

[menniandscience]

No, it's not.

can you describe to me how gravitons behave?

 

[Naty1]

Well, whatever you are reading is wrong - or at least grossly oversimplified. It's not even comparing the right things - real photons from a light bulb are not analogous to virtual gravitons from a static field.

A gross simplification to be sure...

 

[Naty1]

Vanadium posts:

Well, whatever you are reading is wrong - or at least grossly oversimplified. It's not even comparing the right things - real photons from a light bulb are not analogous to virtual gravitons from a static field.

A gross simplification to be sure...

Gravity is unique with regard to self interaction

No it's not. Gluons do too

Thanks, right you are... so many particles to keep track of!