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Do fields have quantum fluctuations and are non-zero in the vacuum?
Non-zero in the same way that for a harmonic oscillator the wave function is non-zero for values of the position of the harmonic oscillator?
Or are they considered as 'mathematical fiction' just as 'virtual' particles?
thanks
Non-zero in the same way that for a harmonic oscillator the wave function is non-zero for values of the position of the harmonic oscillator?
Or are they considered as 'mathematical fiction' just as 'virtual' particles?
thanks