Could Discrete Spacetime Redefine General Relativity in Cosmology?

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SUMMARY

The discussion centers on the implications of redefining the axiom of spacetime in general relativity from continuous to discrete. It explores whether general relativity can still function under the premise that spacetime is composed of minuscule, discrete units at the Planck scale, specifically 3D at Planck length and 1D at Planck time. Participants debate the potential consequences for cosmology and the fundamental understanding of physics if this shift occurs. The conversation emphasizes the need for further exploration into the compatibility of discrete spacetime with established theories.

PREREQUISITES
  • Understanding of general relativity principles
  • Familiarity with Planck scale concepts
  • Knowledge of cosmological theories
  • Basic grasp of quantum mechanics
NEXT STEPS
  • Research the implications of discrete spacetime on general relativity
  • Explore quantum gravity theories and their relation to cosmology
  • Study the Planck length and Planck time in detail
  • Investigate current models of spacetime in theoretical physics
USEFUL FOR

Physicists, cosmologists, and students interested in theoretical physics, particularly those exploring the intersection of general relativity and quantum mechanics.

Richo
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Would general relativity (axiom: spacetime is continuous) still work if we changed the axiom to:
spacetime is discrete (but each individual chunk of it is so incredibly small* relative to a quark or gluon
that it makes no difference)?

*e.g. 3D's of Planck length, 1D of Planck time
 
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I was advised to use a Homework forum. If this is inappropriate, please advise if you know the right forum for me to pose such questions.
As a senior in retirement, physics is my 'home work' but not my 'homework', sorry.
 

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