If quantum field theory calculates that the vacuum energy is infinite and Einstein's theory of gravity implies this energy should produce a curvature of space-time then why shouldn't the universe be round and expanding like a balloon instead of predicted flat? Couldn't it just be we observe it is flat because we are only seeing a minute part of it?

  • $\begingroup$ en.wikipedia.org/wiki/Cosmological_constant_problem $\endgroup$ – Avantgarde Jul 21 at 20:46
  • $\begingroup$ The lidea of the zero point energy in QFT is based on the fact that the lowest energy of a quantum oscillator is not zero. This however is true only on one condition - the oscillator must physically exist. The lowest energy of a quantum oscillator that does not physically exist is zero. $\endgroup$ – safesphere Jul 22 at 3:53
  • $\begingroup$ renormalization > poppycock as superstring theory or does the graviton have a partner? $\endgroup$ – Parish Elliott Jul 22 at 15:14

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