Unification of GR and classical E&M

  • #26
Chronos
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Agreed. A background independent version of string theory would greatly improve its appeal. Even Witten has said as much. The attractive feature of LQG is its limited focus. A quantum theory of gravity is the first, and most important toward any TOE [that may or may not be out there]. Without quantum gravity, a TOE is an unattainable and useless effort. The perceived conflict between LQG and string is imaginary, IMHO.
 
  • #27
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Chronos said:
Agreed. A background independent version of string theory would greatly improve its appeal. Even Witten has said as much. The attractive feature of LQG is its limited focus. A quantum theory of gravity is the first, and most important toward any TOE [that may or may not be out there]. Without quantum gravity, a TOE is an unattainable and useless effort. The perceived conflict between LQG and string is imaginary, IMHO.
The idea that LQG and ST are mutually incompatible is more a matter of opionion than fact. I would say that LQG is more realistic in that t does not postulate things like 11 dimentions or supersymetry. It is based only upon GR and QM.
 
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