Exact Spin Coherent State Path Integral for a Damped Two-Level Atom in an Electromagnetic Wave
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The spin coherent state path integral describing the dynamics of a two-level system interacting with electromagnetic wave of circular polarization is considered. The propagator is first written in the standard form by replacing the spin by a unit vector aligned along the polar and azimuthal directions. Then it is determined exactly using a simple transformations. Thus, the exact energy spectra with corresponding wave functions are deduced.
KeywordsPath integral Propagator Spin coherent state Two level system
This work was supported by PNR research project 8/u05/4094 N0 31/13.