olavisjo wrote:
Is there any evidence that gravity is negative energy? Is it possible to separate nothing into energy and gravity?
Yes, actually there is observed evidence to support this. Although, in terms of gravity it is necessarily more theoretical than measurable.
You are probably aware that in quantum mechanics virtual particles are always popping into and out of existence. They are created in pairs of matter and antimatter. However, what is seldom mentioned is that they also have mass and/or energy.
Now if we consider the concept of General Relativity, then anytime we have mass or energy we necessarily have created gravity. We have created a warping of the fabric of spacetime (which is what we call gravity).
Therefore we can view this process as virtual particles popping into existence and creating basically three types of things. Matter, Anti-matter, and Gravity.
We can't ignore the fact that gravity is being "created" in this process along with these particles of mass and/or energy.
So in answer to your question, "Yes, according to quantum theory, General Relativity, and observational experiments,
nothing can be separated into matter/energy and gravity."
And because of this process it may be possible that Gravity could somehow be the
opposite of matter/energy in terms of conversational balance. And thus if we consider gravity to be "negative energy" from a mathematical point of view, the total energy of the universe could sum to zero.
Calculations have been made along those lines, and I think they do work out to sum to zero.
So yes, this is a viable hypothesis. I'm not sure if it has been accepted or confirmed to be a correct hypothesis, but it's certainly a viable hypothesis in light of these physical theories.
The very existence of
gravity is entirely dependent upon, and caused by the energy/matter content of the universe. If there was no matter in the universe there would be no gravity either. So they are clearly mutually dependent.
The question then becomes: Did these virtual particles actually pop into existence from
nothing? Or was there something there from whence they came?