Graviton Definition and 162 Threads

I don't know the relation of graviton and closed string. Why the graviton is closed string? And what conditions need that? :confused: I really want to know about it in detail.(of course including formula)

if common theory states that gravity exists due to a warping of space-time, then that really doesn't leave any room for the graviton, right? or wrong?

1. A quantizied gravitational wave... 2. They travel at the speed of light 3. They have never been experimentally proven to exist. 4. They have been theoretically proven? 5. They permeate all dimensions. I have some ideas fixed in my head that need to be corrected. In another thread...

Gravity is seen as an effect of spacetime curvature in GR. Why is it that QM sees gravity as a force like the other three fundamentals: Strong, weak and EM. If this is so, why bother envisaging on the graviton, when gravity is due to spacetime curvature and not force via virtual particles.

As far as I can see, the exchange particle involved in gravitational forces is the graviton. However, in the markscheme for both the original and revised EDEXCEL A-Level Physics PHY3 Topics Paper (topic C) it states that it is the photon. Which is correct, or are both correct? Why is there this...

The quantum of gravity is called graviton. And using symbols for quanta of length, \psi_E and \psi_B and quanta of linear momentum, \phi_E and \phi_B, the time independent structure of graviton, G^{-} is given by G^{-} = \psi_E \times \phi_E \cdot \psi_B \times \phi_B

am i correct in thinking that the graviton is out of favor, along with other "things", that could explain gravity?

Say a penny is falling to Earth from a height, Gravitons shoot up from the earth’s surface grabbing the penny and pulling it down to earth. Fair enough. Now imagine that directly above that penny is another penny, also falling to earth, the gravitons pulling at this second penny must have...

I'm under the impression that general relativity with it's curved space-time as a description of the gravitational force is commonly accepted in the physics-community. However there is another interpretation of the gravitational force in terms of a particle, the graviton. This seems to me as...

Does Loop Quantum Gravity support the existence of graviton? I can't imagine how is it possible that graviton can exist if it is to agree with GR, since GR says that gravity is merely a curvature of spacetime and is isn't a force. GR => SR => time dilation & length contraction =>> how does...

"Weighing the Graviton" 9^9 (387,420,489) Combinations/Equations http://physics.nist.gov/cuu/Constants/ [UPDATED 1998 CODATA-NIST VALUES] The Primary Universal Base Unit Values 1) mass… (hc/G)^1/2 = 5.4563026(39) x 10^-8 kg 2) length… (hG/c^3)^1/2 = 4.0507625(38) x 10^-35 m 3) time…...

Could it be calculated that way?..for example take a gravitational classic wave DHab=0, then by proposing a plane wave solution like that Hab=AabExp(KaXb) being Aab a tensor we would have the constraint.. AabKaXb=0 or expressed in momentum..AabPaPb=0 (1) so i think it would by proposing a...