Interplay of classical and quantum dynamics in a thermal ensemble of atoms

@article{Laskar2016InterplayOC,
  title={Interplay of classical and quantum dynamics in a thermal ensemble of atoms},
  author={Arif Warsi Laskar and Niharika Singh and Arunabh Mukherjee and Saikat Ghosh},
  journal={New Journal of Physics},
  year={2016},
  volume={18}
}
In a thermal ensemble of atoms driven by coherent fields, how does evolution of quantum superposition compete with classical dynamics of optical pumping and atomic diffusion? Is it optical pumping that first prepares a thermal ensemble, with coherent superposition developing subsequently or is it the other way round: coherently superposed atoms driven to steady state via optical pumping? Using a stroboscopic probing technique, here we experimentally explore these questions. A 100 ns pulse is… 

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