By Warren D. Smith, firstname.lastname@example.org, PRELIMINARY, NOT FOR CIRCULATION
First draft April 2012. Second draft December 2012.
Abstract. We propose a new non-quantum theory of gravity. Recent astronomy observations appear to refute both Einstein’s general relativity (GR) and several previous authors’ “new improved” gravity theory attempts; we also advance a new refutation from black hole collapse of numerous such new theories including Moffat’s. Switcheroo gravity is essentially the same as GR except that (1) the cosmical constant Λ assumes one of a discrete set of allowed values depending which spacetime region we are in, (2) the Λ-transitions are triggered by F=LabcLabc rising above (or sinking below) a discrete set of thresholds, where Labc is the Lanczos tensor. This is analogous to how temperature surpassing 273 Kelvin melts ice. Actually, the formula for F probably is more complicated (we propose ideas), but making LabcLabc the prime contributor tentatively looks adequate/desirable for explaining galactic rotation curves. Switcheroo gravity is strictly more tunable to fit observations than plain GR, hence better able to fit the problematic galaxy rotation curve and stellar and galactic motion data, perhaps without needing “dark matter.” We give connections to Milgrom’s MOND model suggesting this indeed happens. Switcheroo gravity also appears able to get rid of the singularities plaguing plain GR (e.g. inside black holes) and to automatically cause “inflationary” behavior in the early “big bang” without need for new hypothetical “inflaton” particles. Switcheroo also seems able to yield a Smolin “life of the cosmos” multiverse with no singularities, no beginning, no end, and “pseudo-Darwinian mutations” yielding “fitter” universes and hence capable of explaining at least some problematic “fine tuning.” Switcheroo gravity also explains why spacetime is 4-dimensional – in the sense that it cannot work in other dimensions. Although this paper makes no attempt to solve the open problem of building a quantum gravity theory, it offers new insights about quantizing gravity.
Redzam, ka lielo un mazo attālumu diapazonā mums nepretrunīgu, novērojumus skaidrojošu teoriju nav.
GR seems to have passed every experimental test yet tried at length scales ranging from about 10-4 to 1013 meters and at gravity fields ranging from accelerations of order 10-6 meter/sec2 (sun’s gravity in outer solar system) up to relativistically strong fields 1013 meter/sec2 (gravity at horizon of 2 solar mass black hole). These tests include atomic clock discrepancies, bending of light by sun, light travel times to transponders on spaceprobes (see Turyshev et al 2012 for explanation of the “Pioneer anomaly”), binary pulsar signals, “Stanford gyro” satellite experiment, laser rangefinder alternate “frame dragging” confirmation, precession of perihelion of Mercury, gravitational redshift, Eötvos/Dicke tests of equivalence principle for bodies with different chemical compositions and mass/energy ratios (including gravitational self-energy), and many observations of putative black holes.
But, at length scales>1019 meters (the diameter of the Milky Way galaxy is about 1021 meters), and consequently at extremely weak gravity fields (acceleration≤10-10 meter/sec2), plain GR has hugely disagreed with experiment. The mainstream view has been that these discrepancies were the result of
- Failing to include the Einstein cosmical constant ΛEin in the GR field equations – call the resulting improved equations GR(Λ).
- Failing to reckon the presumed existence of a tremendous amount (measured by mass) of invisible “dark matter.”
Call this mainstream picture the “ΛCDM-model.” (CDM stands for cold dark matter.) If we believe that the universe’s composition is 4.6% ordinary matter, 22.7% invisible dark matter, and 72.8% Einstein cosmical constant (by mass), and the dark matter consists of new fundamental particles of with rest masses >1013eV/c2 or so which only interact with normal mass-energy gravitationally (and perhaps via the “weak force”) – thus explaining why those particles have not yet been detected using nongravitational physics – then GR(Λ) also seemed at least on shallow examination to agree well with observation at length scales from 3×1022 meters (Galaxy clusters) up through above 1026 meters (cosmology models).
Vērtīgs raksts, kas dod priekšstatu par globālo stāvokli Visuma izpratnes veidošanā.