Interaction-free all-optical switching at low light intensities in a multiatom cavity-QED system

  title={Interaction-free all-optical switching at low light intensities in a multiatom cavity-QED system},
  author={Bichen Zou and Zheng Tan and M. O. Musa and Yifu Zhu},
  journal={Physical Review A},
We propose a scheme of the interaction-free all-optical switching in a multiatom cavity-QED system consisting of three-level atoms confined in a cavity and coupled by a free-space control laser. A signal laser field is coupled into the cavity and its transmission through and reflection from the cavity form two output channels. We show that the free-space control laser induces destructive quantum interference in the excitation of the atom-cavity normal mode, which can be used to switch on or off… 
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