hi , i am not getting how harmonic oscillator is linked to the modes of radiation field- as explain by Dirac in his quantum theory of radiation.

bhobba
Mentor
hi , i am not getting how harmonic oscillator is linked to the modes of radiation field- as explain by Dirac in his quantum theory of radiation.

Get a hold of Quantum Field Theory for the Gifted Amateur:
https://www.amazon.com/dp/019969933X/?tag=pfamazon01-20&tag=pfamazon01-20

There are a number of different equivalent forms of QM. There is a form based on annihilation and creation operators, which is not that well known, that brings out this connection very clearly. The above reference explains it in detail.

Check out:
http://math.bu.edu/people/mak/Styer Am J Phys 2002.pdf

See formulation 7

Thanks
Bill

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vanhees71