Interaction of 3-level atom with radiation
Interactionof3–levelatomwithradiation
L.Accardi,K.Imafuku,S.V.Kozyrev
February1,2008
Abstract
Theinteractionof3–levelsystemwithaquantumfieldinanon–equilibriumstateisconsidered.Wedescribeaclassofstatesofthequantumfieldforwichastationarystatedrivesthesystemtoinversepopulatedstate.WefindthatthequotientofthepopulationoftheenergylevelsinthesimplestcaseisdescribedbythedoubleEinsteinformulawhichinvolvesproductsoftwoEinsteinemission/absorptionrelations.Emissionandabsorptionofradiationby3–levelatominnon–equlibriumstationarystateisdescribed.
arXiv:quant-ph/0104118v124Apr2001
1Introduction
Inthepresentpaperweconsidera3–levelsystem(forexampleanatominteractingwithradiation.Inthework[1]weapplythetechniquedevelopedheretodescribestimulatedemissionfor3–levelatominteractingwithradiationinanon–equilibriumstate.Inthework[2]a2–levelquantumsysteminteractingwithquantumfieldwasconsidered.In[3]astationarynonequilibriumstateforann–levelsysteminteractingwithanonequilibriumquantumfieldwasobtained.
Weshowthatforsuchasystemapplicationof 