• Theory of coherent, degenerate two-photon absorption and emission

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    • Keywords


      Two-photon absorption; two-photon emission; coherent two-photon processes; photon antibunching

    • Abstract


      The theory of the coherent, two-photon resonant interaction of a monochromatic field with N atoms is given. It is seen that the dynamics of the atom-field system can be completely determined when the field is “strong”. Two specific examples are given: (i) two-photon absorption by atoms in ground state, and (ii) stimulated two-photon emission by fully excited atoms, assuming a coherent field in both cases. In case (ii), the field shows photon-antibunching after the decay of half of the atoms. The merits of our approach are shown by comparing with other treatments. Our results can also be applied to certain degenerate four-wave mixing processes which are described by a similar Hamiltonian.

    • Author Affiliations


      Sunil Kumar1

      1. Physics Department, M.D. University, Rohtak - 124 001, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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