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Thread: Relating Quantum Field Theory with String Theory

  1. #1 Relating Quantum Field Theory with String Theory 
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    Could both QFT and ST be correct or are they different theories. I have read a book about both of them but do not understand how they relate. Could someone please help. If they are completely different theories then which one is more believable. String theory doesn't seem to have any evidence and is purely theoretical as far as I know. I understand quantum field theory much better but I know that string theory is also very popular. If you know anything about the two please help.


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    Moderator Moderator Markus Hanke's Avatar
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    Quote Originally Posted by MaxH View Post
    Could both QFT and ST be correct or are they different theories. I have read a book about both of them but do not understand how they relate. Could someone please help. If they are completely different theories then which one is more believable. String theory doesn't seem to have any evidence and is purely theoretical as far as I know. I understand quantum field theory much better but I know that string theory is also very popular. If you know anything about the two please help.
    Quantum Field Theory is a general mathematical term which refers to any model that represents fields of quantum objects. These could be any quantum object, and depending which object you choose you get a specific field theory, e.g. photons & electrons ( = QED ), quarks & gluons ( =QCD ), or Strings ( =SFT ).

    While the QFTs of the Standard Model are empirically tested, SFT is not. The entire area of String Theory in general is, at the present time, merely a hypothesis.


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    You'd think those guys would have known better than to name it String Theory.
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    Anti-Crank AlexG's Avatar
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    Quote Originally Posted by Neverfly View Post
    You'd think those guys would have known better than to name it String Theory.
    They were being hopeful. I really think Brian Greene and John Whitten expected it to be much further developed by now.
    Its the way nature is!
    If you dont like it, go somewhere else....
    To another universe, where the rules are simpler
    Philosophically more pleasing, more psychologically easy
    Prof Richard Feynman (1979) .....

    Das ist nicht nur nicht richtig, es ist nicht einmal falsch!"
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    Hmmm... I don't think that's the proper place to be hopeful...
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