Fig. 1: Schematics of the atomic levels and laser configuration in 1D SL.
From: Synthesized magnetic field of a sawtooth superradiance lattice in Bose–Einstein condensates
a Energy diagram of the 52S1∕2 − 52P1∕2 and 52S1∕2 − 52P3∕2 transitions of 87Rb. A pair of strong coupling laser beams (around 795 nm) form a superradiance lattice and drive the transition between \(\vert e\rangle =\vert F^{\prime} =1,{m}_{F}^{\prime}=1\rangle\), \(\vert m\rangle =\vert F=1,{m}_{F}=1\rangle\). Another pair of strong laser beams (around 780 nm), which has a blue detuning of 200 MHz between \(\vert m\rangle =\vert F=1,{m}_{F}=1\rangle\) and \(\vert F^{\prime} =2 \rangle\) for 52S1∕2 − 52P3∕2 transition, provide the NNN transitions. The weak probe light drives the transition between the ground state \(\vert g \rangle =\vert F=2,{m}_{F}=2 \rangle\) and the excited state \(\vert e \rangle\). Atoms are initially prepared in \(\vert g \rangle\). b The laser configuration for the experiment. Two probe lasers probe the BEC in two opposite directions.
