Radiation from Polarized Atoms. Quantum Beats

  • Karl BlumEmail author
Part of the Springer Series on Atomic, Optical, and Plasma Physics book series (SSAOPP, volume 64)


In this chapter we will consider the decay of an ensemble of excited atoms by photon emission. We will discuss the following case. We assume that an ensemble of atoms has been excited “instantaneously” at time t = 0. As usual, “instantaneous” implies that the excitation time is short compared to the mean lifetime of the excited states and any characteristic precession frequency (see Sects. 3.5 and 4.7.1).


Excited State Density Matrix Hyperfine Interaction Excited Atom Stokes Parameter 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Institut für Theoretische PhysikUniversität MünsterMünsterGermany

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