Definitions
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- noun Alternative spelling of
renormalization .
Etymologies
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Examples
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What do you think that 'renormalisation' is except a way to turn away from infinity because ultimately maths cannot explain everything because we dreamt it up and we can't know everything?
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Heisenberg-Pauli's field theory and Fock space, and through Feynman's ingenious theory describing electromagnetic interaction as an action at a distance eliminating the photon picture, ending with Dyson's renormalisation theory supplemented with Salam's paper on b-divergence.
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One needs to go to a different representation to get such a vacuum, and this is what the limit of renormalisation accomplishes.
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The need for renormalisation came from the fact that the total ground state energy of an infinity of quantum oscillators is infinite in the original representation (infinite tensor product of Schroedinger reps of the oscillators), as pointed out by Mark Srednicki in his post #452, and hence in this representation we do not have an invariant vacuum vector.
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The (mathematical) techniques of renormalisation are methods for finding new representations with the correct physical properties from the data of the original representation.
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It seems to me that one will never be able to really understand QM or QED if one cannot solve this problem without requiring renormalisation; and this I believe could lead to a reinterpretation of QM and QED.
Quantum Mechanics Made Easy? Sean 2006
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It could be that the fundamental theory happens to be a very particular QFT plus a control of the renormalisation process.
The String Theory Backlash Sean 2006
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I believe that it also lies at the root of renormalisation in QED.
Quantum Mechanics Made Easy? Sean 2006
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So much from such a simple model - the inspiration for the critical phenomena industry and countless insights into the renormalisation group - and the math is so cool.
The Greatest Physics Paper! cjohnson 2005
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So much of the good stuff in the QFT description of subatomic physics (and aparently also in condensed matter) has come from applications of renormalisation group techniques, so I really want to nominate
The Greatest Physics Paper! cjohnson 2005
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