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Einstein's Mistake
(Steven Weinberg)

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When introduction cosmology constant, Einstein has truly violated thestupid mistake which makes one be startled.Although like this may cause the static universe model which evolvesnot as necessary, but this solution certainly is not stable.The cosmology constant function equates to the repelling force whichincreases along with the distance increase, but the usual attractionmutual action increases the time along with the distance whichweakens. Although the material density has a critical point, in thispoint attraction and repelling force phase equilibrium, but this kindof balance is unstable; The weak inflation can cause the repellingforce the increase as well as attraction being weaken, thus causes theacceleration inflation. Very difficult to do understood Einsteinhasn't noted why this basic difficulty.In addition, Einstein as soon as starts time on by philosopher Mach(Ernst Mach) the thought for did muddled: The inertia phenomenon isbecause the distant place matter creates.In order to cause the inertia is limited, Einstein in 1917 timethought the universe should be limited, at the same time him alsothought the universe the boundary should be a three dimensionalspherical surface.This is why did he see bareness universe model puts in the examinationgranule in de in a Sitter (Test Particle) to have completely time theusual inertia nature is extremely surprised.In the general theory of relativity, the remote photostar qualitycertainly is not the inertia origin, although they truly can affectthe inertia are (Inertial Frame) choice. But this mistake certainly noproblem.Just like Einstein such which in 1917 article pointed out in him, isthe universe static state supposition but the non- universe islimitedly causes to have to introduce the cosmology constant.Looked stemming from the esthetic choice simplicity from todaytheoretical physics angle, Einstein violates a more serious mistakewas he finally has abandoned the cosmology constant. When heestablishes the general theory of relativity time, Einstein not onlyrelied on simple physical rule - him the attraction and the inertiaequal in value equivalent theorem which developed to 1917 (Principleof Equivalence) - moreover also relies on from 1907 the Austria Kammshaving cutter (Occam ' s Razor), also was the theory equation notonly should satisfy the above equivalent theorem, moreover should beas far as possible simple.Speaking of the equivalent theorem, in the equation may appear thecomplexity is nearly not limited. Einstein originally may join foursteps in his equation the SpacetimeDerivatives, perhaps six steps even Gao Jie SpacetimeDerivatives,but he certainly not such does, only uses the second-orderdifferential equation.This may explain this question from the practical angle. Is notdifficult from the dimension analysis to know that, involves to ishigher than two steps SpacetimeDerivatives field equation, in whichmust appear in proportion to some length power constant factor.If in this length and fundamental particle physics or the atomicphysics appear the length similar speech, these Gao Jiexiang effect -mainly is in fact - on effect may neglect in a greater criterion inthis criterion observation attraction phenomenon.Only has one kind the plan which revises to the Einstein generaltheory of relativity equation to have may observe the effect: Theintroduction completely does not involve any Spacetime Derivativesitem, also is the cosmology constant.But Einstein certainly is not because the above reason - perhaps otherusable reason - removes Gao Jiexiang, but is as a result of theesthetic reason: They certainly do not need, why therefore has toinclude them?Is precisely this esthetic judgement causes him extremely to regretinitially introduced the cosmology constant. Since Einstein's time, wehave learned no longer to believe this kind of esthetic criterion. Wetell us in the fundamental particle physics domain experience, thebasic principle permission any item which appears in the phcs fieldequation all has the possibility to appear in the equation.This writes "The Once and Future King" like T. H. White in the bookant world: The matter which forbids is not must have to do. In fact,so long as we calculate are not difficult to discover that, Quantum Fluctuation itself to be allowed to havethe infinity effective cosmology constant, therefore must thesupposition in the field equation originally on the existence Does not have the boundary big counter- number " bare cosmology constant" , by obtain the limited cosmology constant.The Austria Kamm shaving cutter is a very good tool, but itsapplication object should be the physics principle but is not anequation. Perhaps Einstein has come under the Maxwell theoryinfluence, when he or a Zurich technology institute's student's timeon through studied independently has grasped this theory. Maxwell fordescribe the known electromagnetic phenomenon to write down theseequations, these equations observe the electric charge conservationrelations; In the Maxwell equation, only appeared the lowest Spacetime Derivativesitem.Today, we knew may contain the free step in the descriptionelectromagnetism rule equation the Spacetime Derivativesitem, but thesehigh steps derivatives item and in a general theory of relativity high step derivativesitem of dissimilarity, are do not have in the macroscopiccriterion to be possible to observe the effect. Since 1917 astronomerssome times can see the cosmology constant existence the sign, but theyfinally only have produced an upper limit. This upper limit comparesthe contribution which the quantum fluctuates to have to be muchsmaller, thereupon many physicists and the astronomers on according tothe above thought the cosmology constant should is equal to 0. But,regardless of we how diligently, nobody did find an appropriatephysics law request cosmology constant strictly to be equal to zero.To the remote supernova survey demonstration universe in the majorityis the dark energy, their effect and the cosmology constant areconsistent.



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