LI CHANGJIANG. The equation of two level system-intensive fields interaction and its analytic solution[J]. Acta Optica Sinica, 1983, 3(9): 769
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In this paper, the general optical Bloch equation describing interaction between intensive fields and two level system is obtained without using rotating wave approximation. The first-order solution of this equation is obtained by iterative method and analytic formulas of transition probability as a function of time, perturbation frequency and strength are presented. These results are in agreement with those obtained by an iterative step-wise power series and numerical integration solution for the time dependent Schrodnger equation. And these simplified and clear mathmatical formulas facilitate the application of physics.