‘We pay attention “string principle requires the brand new graviton” issue a lot, nevertheless the merely factor I have seen is the fact it forecasts an excellent spin-2 particle.’ – Deprive Knop, ,
‘A beneficial massless spin dos particle is pretty much needed to become a beneficial graviton of the some efficiency which go to Feynman, I believe.’ – Sequence theorist Aaron Bergman, , (Indeed Richard P. )
‘Deprive, plus all excellent reason a great massless spin 2 particle must be the graviton, there are even direct data demonstrating you to forgone end …’ – Moshe, ,
‘Aaron Bergman blogged: ‘An effective massless spin dos particle is in fact required to feel good graviton of the certain abilities that go to Feynman, I think.’
Essentially you do not have that many of them lying to, regardless if I don’t know this new rigorous declaration compared to that effect
‘Any type of this type of email address details are, they need to have most presumptions. … Most of these have absolutely nothing regarding gravity. A beneficial graviton needs to get in touch with any other field – along with an extremely specific method.
‘Very, it could be interesting to take on the outcomes you might be speaking from the, and watch whatever they in fact state. Probably the Einstein-Hilbert action is the “the very least nonrenormalizable” means for a go-dos particle to engage along with other dirt… whatever meaning?’ – Professor John Baez, ,
‘B produces: ‘The fresh spin dos particle is only able to couple into opportunity-impetus tensor – just like the gravity really does.’Oh? As to the reasons?’ – Professor John Baez, ,
‘…the overriding point is the massless twist-2 job was explained by a symmetrical a couple-list [rank-2] tensor with a particular determine balance. … Very the source need to be a shaped divergenceless one or two-index tensor. ‘ – Professor Sean Carroll, ,
‘There is a general belief, reinforced by statements in standard textbooks http://datingranking.net/cs/chatspin-recenze, 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 the Feynman Lectures towards the Gravitation, web page 29, one to gravitons needn’t be spin-dos, with perhaps not come observed
Today we shall have a look at a beneficial predictive proof of the newest acceleration out of new world which started through to the observance the world is quickening, a beneficial = Hc.
Observe that new outward velocity away from repulsion are opposed from the inwards acceleration on account of destination out-of the law of gravity, therefore, the data is appearing a lack of velocity. Due to the fact cosmologists understood about Friedmann metric regarding standard relativity one to the new market meltdown will likely be postponing (expansion can be decelerating) at large distances, its lack of one to deceleration required the clear presence of an acceleration. Ergo, since the Nobel Laureate Phil Anderson claims, the noticed facts regarding the fictional cosmological ongoing and dark time is just that: