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raisin_raisin

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**Feynman Looking for A "Particle Version" of QFT**

Hey,

I think I read somewhere (though can't find it now) that Feynman was looking for a 'particle' version of quantum field theory which he didn't find but this instead led to the path integral approach of quantum mechanics. Can anyone shed any light on this? Not knowing that much particle physics I don't understand how QFT could get any more particle based.

Thank you in advance.