Correlated emission lasing in harmonic oscillators coupled via a single three-level artificial atom

Understand

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.