Correlated emission lasing in harmonic oscillators coupled via a single three-level artificial atom
Abstract
A single superconducting artificial atom provides a unique basis for coupling electromagnetic fields and photons hardly achieved with a natural atom. Bringing a pair of harmonic oscillators into resonance with transitions of the three-level atom converts atomic spontaneous processes into correlated emission dynamics. We demonstrate two-mode correlated emission lasing on harmonic oscillators coupled via the fully controllable three-level artificial atom. Correlation of two different color emissions reveals itself as equally narrowed linewiths and quench of their mutual phase-diffusion. The mutual linewidth is more than four orders of magnitude narrower than the Schawlow-Townes limit. The interference between the different color lasing fields demonstrates the two-mode fields are strongly correlated.
Cite
@article{arxiv.1505.02858,
title = {Correlated emission lasing in harmonic oscillators coupled via a single three-level artificial atom},
author = {Z. H. Peng and Yu-xi Liu and J. T. Peltonen and T. Yamamoto and J. S. Tsai and O. Astafiev},
journal= {arXiv preprint arXiv:1505.02858},
year = {2015}
}
Comments
5 pages, 4 figures + supplemenntary materials accepted for publication in Phys. Rev. Lett