Question: Many processes involve the absorption of single photons from a quantum field state, the process of absorption being represented by the action of the

Many processes involve the absorption of single photons from a quantum field state, the process of absorption being represented by the action of the annihilation operator . For an arbitrary field state |), the absorption of a single photon yields the state '~y). Normalize this state. Compare the average photon numbers of the state ) and n' of the state |'). Do you find that ' = 1?

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