The development of a [[quantum field theory]] of a force invariably results in infinite (and therefore useless) probabilities. Physicists have developed mathematical techniques ([[renormalization]]) to eliminate these infinities which work for three of the four fundamental forces – [[Electromagnetic force|electromagnetic]], [[Strong interaction|strong nuclear]] and [[Weak interaction|weak nuclear]] forces – but not for [[gravity]]. The development of a [[quantum theory of gravity]] must therefore come about by different means than those used for the other forces.<ref>Polchinski, Joseph. ''String Theory: Volume I''. Cambridge University Press, p. 4.</ref> |
The development of a [[quantum field theory]] of a force invariably results in infinite (and therefore useless) probabilities. Physicists have developed mathematical techniques ([[renormalization]]) to eliminate these infinities which work for three of the four fundamental forces – [[Electromagnetic force|electromagnetic]], [[Strong interaction|strong nuclear]] and [[Weak interaction|weak nuclear]] forces – but not for [[gravity]]. The development of a [[quantum theory of gravity]] must therefore come about by different means than those used for the other forces.<ref>Polchinski, Joseph. ''String Theory: Volume I''. Cambridge University Press, p. 4.</ref> |