Though it is not the Raman effect, this process can exhibit a phenomenon in which the time required for emission results in an energy loss, known as the (*) Stokes shift.
Wigner and Weisskopf were the first to derive the delta function spectrum of this process at low intensities. At high intensities, the spectrum of this process in a simple two-level driven system takes on the form of three Lorentzians, consisting of a central peak and two sidebands that peak at the central frequency plus or minus the Rabi frequency, a result known as the Mollow triplet. Carmichael and Walls first derived the result that showed that a single-atom version of this process would demonstrate photon anti-bunching, or, the tendency of the emitted light to be spaced coherently, an effect observed experimentally by Kimble. Though it is not the Raman effect, this process can exhibit a phenomenon in which the time required for emission results in an energy loss, known as the (*) Stokes shift. The efficiency of this process, which emits photons that have sub-Poissonian statistics, is usually measured by a ratio called the quantum yield. For 10 points, identify this process in which a stimulated system re-emits light at a different frequency.
Wigner and Weisskopf were the first to derive the delta function spectrum of this process at low intensities.
fluorescence [accept word forms]