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kent davidge
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How do you know what fields can be coupled with the gravitational field? Is there a general procedure for knowing it or we have to try out and see whether it makes sense or not?
Interacting with each otherVanadium 50 said:Can you defined "coupled with"?
kent davidge said:Interacting with each other
And your lazy when you read my question instead of thinking about it, you claim it's incomplete.Vanadium 50 said:If it's not worth your time to write a complete sentence explaining what exactly you are looking for, how do you expect to tet a good answer?
Thank you, that's an adequate type of answer.haushofer said:We do know that coupling gravity to spins exceeding 2 gives problems, see e.g.
https://en.m.wikipedia.org/wiki/Higher-spin_theory
kent davidge said:And your lazy when you read my question instead of thinking about it, you claim it's incomplete.
kent davidge said:that's an adequate type of answer
kent davidge said:And your lazy when you read my question instead of thinking about it
PeterDonis said:To really adequately answer the latter question, you need to come up with a precise definition of what "coupled with" (or "interacting with") means.
sweet springs said:Any other field that has something to do with energy and momentum
sweet springs said:would have to relate with gravity through Einstein equation
Any field with energy and momentum other than gravitational field, e.g. electromagnetic field.PeterDonis said:Which is any other field, period.
I have no idea how to deal with gravity and quantum object like particle spin. Thanks.PeterDonis said:ut this does not address issues like the one raised above, about fields with spin greater than 2 not being able to consistently couple to gravity (such fields can still have a stress-energy tensor).
Allowed fields in General Relativity refer to the types of matter and energy that can exist in a given space-time according to the theory of General Relativity. These fields are important because they determine the curvature of space-time and the behavior of objects within it.
The three main types of allowed fields in General Relativity are matter fields, electromagnetic fields, and gravitational fields. Matter fields refer to particles and their associated properties, electromagnetic fields refer to the interactions between charged particles, and gravitational fields refer to the curvature of space-time caused by the presence of mass and energy.
No, not all types of matter and energy can exist as allowed fields in General Relativity. For example, exotic matter with negative mass or energy is not allowed in this theory. Additionally, fields that violate the laws of thermodynamics or causality are not considered allowed fields in General Relativity.
Allowed fields in General Relativity determine the curvature of space-time, which in turn affects the motion of objects within it. For example, the presence of a strong gravitational field can cause objects to orbit around a massive object, while the presence of an electromagnetic field can cause charged particles to interact and move in a certain way.
Yes, there are some limitations to the concept of allowed fields in General Relativity. This theory does not account for the behavior of particles at a quantum level, and it also does not take into consideration the effects of dark matter and dark energy, which are still not fully understood by scientists.