‘I listen up “sequence theory need the fresh graviton” material a great deal, however the merely reason I’ve seen is the fact they predicts a beneficial spin-2 particle.’ – Deprive Knop, ,

‘A good massless twist 2 particle is in fact required to end up being an excellent graviton by specific show which go back once again to Feynman, In my opinion.’ – Sequence theorist Aaron Bergman, , (Indeed Richard P. )

‘Deprive, and additionally every advanced level reason a good massless twist 2 particle must be the graviton, there are even direct calculations proving you to definitely forgone achievement …’ – Moshe, ,

‘Aaron Bergman published: ‘A massless spin 2 particle is pretty much necessary to be a graviton of the specific show that go returning to Feynman, In my opinion.’

Generally there is no need a large number of her or him lying as much as, in the event I’m not sure the newest rigid declaration to that perception

‘Any such results are, they must provides a lot more assumptions. … All these have nothing related to gravity. A great graviton must relate genuinely to every other job – and in an extremely certain means.

‘So, it could be fascinating to consider the outcomes you will be talking about, and watch whatever they in reality state. Probably the Einstein-Hilbert action ‘s the “minimum nonrenormalizable” opportinity for a go-2 particle to activate along with other dust… almost any that means?’ – Professor John Baez, ,

‘B writes: ‘The new spin dos particle can simply couple to the energy-impetus tensor – as gravity does.’Oh? As to the reasons?’ – Teacher John Baez, ,

‘…the main point is the massless spin-2 profession are described by the a shaped one or two-directory [rank-2] tensor that have a specific assess symmetry. … Very its origin should be a symmetrical divergenceless a few-directory 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 h_ab 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 S_ab, to which the graviton field h_ab couples to the lowest order (through a term of the form S_abh_ab in the lagrangian). We show that the second rank tensor S_ab is not the conventional energy momentum tensor T_ab 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 S_ab 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 T_ab order by order and show that this does _not lead to Einstein’s theory.’

Feynman explains in the Feynman Lectures for the Gravitation, webpage 30, you to definitely gravitons do not have to feel spin-2, with not already been seen

Now we’ll take a look at a beneficial predictive proof of the newest velocity away from the fresh new universe and that started through to the observance that world are accelerating, an effective = Hc.

Notice that the fresh new external velocity out-of repulsion is compared of the inwards velocity due to attraction off the law of gravity, so the info is proving an absence of acceleration. Because the cosmologists realized throughout the Friedmann metric from podpora adam4adam standard relativity that the latest recession will be delaying (extension would be decelerating) at large distances, its lack of you to definitely deceleration meant the clear presence of a speed. Thus, given that Nobel Laureate Phil Anderson states, the fresh observed reality about your fictional cosmological ongoing and you may black time is merely that: