On limiting field strengths in gravitation

@article{Sabbata1993OnLF,
  title={On limiting field strengths in gravitation},
  author={Venzo de Sabbata and C A Sivaram},
  journal={Foundations of Physics Letters},
  year={1993},
  volume={6},
  pages={561-570}
}
We consider through the equivalence principle the existence of maximal and minimal field strengths in gravitation. We explore the consequences for gravitational collapse and for explaining the rotation curve of galaxies without invoking dark matter. Other interesting implications like maximal size of planetary systems are outlined. 

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References

SHOWING 1-9 OF 9 REFERENCES

Magnetic fields in the early universe

SummaryWe consider some mechanisms which can be responsible for the formation of a magnetic field in the early universe. It happens that introducing the spin-torsion coupling interaction a magnetic

Torsion and inflation

We show that considering the torsion in early universe, we are led to an inflationary expansion with only a massless scalar field, so avoiding all physical questions that we are facing when working

Maximum acceleration and magnetic field in the early universe

The maximum acceleration at the Planck epoch is shown to be related to the maximum magnetic field and curvature as well as temperature in that era. Spin-torsion effects at that epoch also lead to

Messing around with gravity

Attempts to dispense with the need for galactic dark matter by altering the inverse square law of gravitational attraction have attracted a small but persistent advocacy.

Spin and torsion may avert gravitational singularities

IT has long been recognized that isotropic models of the world are singular. The models, be they Newtonian or based on Einstein's equations of general relativity, lead to the prediction of at least

A minimal time and time-temperature uncertainty principle

We show that introducing torsion in general relativity, that is, physically, considering the effect of the spin and linking the torsion to defects in spacetime topology, we can have a minimal unit of

The Central Role of Spin in Black Hole Evaporation

1. Introduction 2. Black hole evaporation and spin effects in black hole evaporation 3. Quantization of entropy and minimum entropy 4. Further arguments on analogy between angular momentum and