‘We hear this “string idea need the newest graviton” material a great deal, but the only explanation I have seen would be the fact they predicts a beneficial spin-2 particle.’ – Deprive Knop, ,
‘A good massless spin dos particle is in fact necessary to feel a great graviton by specific abilities which go to Feynman, I think.’ – String theorist Aaron Bergman, , (Actually Richard P. )
‘Deprive, plus every higher level reason a massless twist dos particle should be the graviton, there are even direct data proving one forgone end …’ – Moshe, ,
‘Aaron Bergman penned: ‘A good massless spin dos particle is in fact necessary to end up being a great graviton because of the particular results that go back once again to Feynman, In my opinion.’
Generally you don’t need to a large number of them lying as much as, even when I don’t know brand new strict statement to that impact
‘Any kind of these email address details are, they have to provides most presumptions. … A few of these have absolutely nothing to do with gravity. A graviton has got to connect with another career – plus an incredibly specific way.
‘Therefore, it would be fascinating to adopt the outcomes you may be speaking throughout the, and discover whatever they in fact state. Maybe the Einstein-Hilbert action ‘s the “the very least nonrenormalizable” opportinity for a spin-dos particle to interact with other dust… any kind of it means?’ – Teacher John Baez, ,
‘B writes: ‘The newest spin 2 particle can just only few to your times-impetus tensor – since the the law of gravity really does.’Oh? Why?’ – Teacher John Baez, ,
‘…the main point is the massless twist-2 field was https://www.datingranking.net/cs/flingster-recenze explained by a symmetrical one or two-list [rank-2] tensor having a particular determine balance. … So their provider should be a symmetric divergenceless two-list tensor. ‘ – Professor 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 points out on Feynman Lectures with the Gravitation, webpage 31, one gravitons will not need to end up being spin-dos, which has not come seen
Now we’ll evaluate a predictive evidence of the new speed out of brand new market hence originated up until the observance that the market is quickening, an effective = Hc.
See that the latest external acceleration out of repulsion is compared by inward acceleration because of appeal away from the law of gravity, and so the data is indicating a lack of acceleration. As cosmologists understood throughout the Friedmann metric out of standard relativity one brand new market meltdown would be slowing down (extension are going to be decelerating) at large ranges, its lack of one deceleration required the clear presence of an acceleration. Ergo, since Nobel Laureate Phil Anderson claims, the newest observed facts about your imaginary cosmological ongoing and you will black time is merely one: