- #1
Jeffrey Yang
- 39
- 0
I know the positive field operator E+ is actually an annihilation operator a while the negative field E- is a creation operator a+.
I also learned that the absorption process can be represented as E-E+, which should be the number of photons n accroding to the principle of ladder operator. Also, the emission is E+E-, whose eigenvalu however is n+1.
How to understand this extra 1 here? Why emitted number is n+1 rather than n? Is that 1 the vacuum field? But should the vacuum field cannot released through emission?
Thanks a lot
I also learned that the absorption process can be represented as E-E+, which should be the number of photons n accroding to the principle of ladder operator. Also, the emission is E+E-, whose eigenvalu however is n+1.
How to understand this extra 1 here? Why emitted number is n+1 rather than n? Is that 1 the vacuum field? But should the vacuum field cannot released through emission?
Thanks a lot