‘We hear this “sequence idea requires the newest graviton” matter a lot, however the only need I’ve seen is the fact they forecasts an effective spin-dos particle.’ – Rob Knop, ,
‘A great massless twist 2 particle is pretty much necessary to be an effective graviton of the specific abilities that go returning to Feynman, I do believe.’ – String theorist Aaron Bergman, https://datingranking.net/cs/chappy-recenze/, (In reality Richard P. )
‘Deprive, also all of the advanced level good reason why an excellent massless spin 2 particle should be the graviton, there are even specific calculations exhibiting you to forgone end …’ – Moshe, ,
‘Aaron Bergman penned: ‘An effective massless spin 2 particle is in fact expected to end up being an excellent graviton from the some performance that go returning to Feynman, I think.’
Fundamentally you don’t need to that many of her or him lying as much as, though I’m not sure the new rigorous report to that perception
‘Almost any such email address details are, they need to has actually even more presumptions. … All of these have nothing to do with the law of gravity. Good graviton has to relate with almost every other field – plus in an incredibly certain ways.
‘Very, it could be interesting to consider the outcomes you happen to be talking on the, and find out what they in fact state. Possibly the Einstein-Hilbert action is the “minimum nonrenormalizable” opportinity for a spin-dos particle to interact together with other dust… whichever this means?’ – Professor John Baez, ,
‘B produces: ‘The brand new twist dos particle can simply couple into times-energy tensor – because the law of gravity really does.’Oh? Why?’ – Teacher John Baez, ,
‘…the point is that the massless twist-2 occupation is explained because of the a symmetrical a couple of-index [rank-2] tensor which have a certain evaluate proportion. … Thus their provider should be a symmetrical divergenceless one or two-list tensor. ‘ – Teacher Sean Carroll, ,
‘There is a general belief, reinforced by statements in standard textbooks, that: (i) one can obtain the full non-linear Einstein’s theory of gravity by coupling a massless, spin-2 field hab self-consistently to the total energy momentum tensor, including its own; (ii) this procedure is unique and leads to Einstein-Hilbert action and (iii) it only uses standard concepts in Lorentz invariant field theory and does not involve any geometrical assumptions. After providing several reasons why such beliefs are suspect – and critically re-examining several previous attempts – we provide a detailed analysis aimed at clarifying the situation. First, we prove that it is impossible to obtain the Einstein-Hilbert (EH) action, starting from the standard action for gravitons in linear theory and iterating repeatedly. … Second, we use the Taylor series expansion of the action for Einstein’s theory, to identify the tensor Sab, to which the graviton field hab couples to the lowest order (through a term of the form Sabhab in the lagrangian). We show that the second rank tensor Sab is not the conventional energy momentum tensor Tab of the graviton and provide an explanation for this feature. Third, we construct the full nonlinear Einstein’s theory with the source being spin-0 field, spin-1 field or relativistic particles by explicitly coupling the spin-2 field to this second rank tensor Sab order by order and summing up the infinite series. Finally, we construct the theory obtained by self consistently coupling hab to the conventional energy momentum tensor Tab order by order and show that this does not lead to Einstein’s theory.’
Feynman highlights regarding Feynman Lectures on Gravitation, web page 30, you to gravitons needn’t be twist-2, which has maybe not become noticed
Now we are going to see a good predictive evidence of the new speed out-of the fresh market and that began before the observance your market is actually increasing, a beneficial = Hc.
Observe that new outward speed regarding repulsion is opposed from the inward speed due to attraction off the law of gravity, and so the information is appearing an absence of acceleration. As the cosmologists realized from the Friedmann metric out of general relativity you to the newest recession are going to be slowing down (extension will be decelerating) at-large distances, its lack of you to deceleration designed the current presence of a velocity. Ergo, as the Nobel Laureate Phil Anderson states, the fresh new observed fact concerning your fictional cosmological ongoing and you will ebony times is one to:
