Absorption-free optical control of spin systems: The quantum Zeno effect in optical pumping

  title={Absorption-free optical control of spin systems: The quantum Zeno effect in optical pumping},
  author={Toshihiro Nakanishi and Keisaku Yamane and Masao Kitano},
  journal={Physical Review A},
We show that atomic Spill motion can be controlled by circularly polarized light without light absorption in the strong pumping limit. In this limit, the pumping light which drives the empty spin state, destroys the Zeeman coherence effectively and freezes the coherent transition via the quantum Zeno effect. It is verified experimentally that the amount of light absorption decreases asymptotically to sera as the incident light intensity is increased. 

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Experimental results ͑᭪͒, theoretical line fitted with the results ͑solid line͒, and theoretical line without relaxation ͑dashed line͒