Quantum coherence in atom ensemble system

 

Computation of topological charges of optical vortices via nondegenerate four-wave mixing

 

        

 

 

Generating Bragg solitons in a coherent medium

Fig. (a) Energy diagram of the atom.(b) Geometric configuration of the lights.Coupling beam and probe beam are co-propagating.

 

Optical pumping-assisted electromagnetically induced transparency

 

 

 

 

 

 

 

 

 

 

 

 

 

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