Coherence-Assisted Superradiant Laser with Hz Linewidth and $10^{-10}$W Power

Guohui Dong, Yao Yao, Peng Zhang +1

The superradiant laser, based on the clock transition between the electric ground state ${}^1$S${}_0$ and the metastable state ${}^3$P${}_0$ of fermionic alkaline-earth(-like) atoms, has b…