Hyperfine interaction in the Autler-Townes effect: The formation of bright, dark, and chameleon states

This work was supported by the U.S. Office of Naval Research under Grant No. N00014-12-1-0514. Partial support by the EU FP7 Centre of Excellence FOTONIKA-LV (T.K. and N.N.B.), EU FP7 IRSES project NOCTURNAL ATMOSPHERE (K.M.) and the trilateral Grant No. LV-LT-TW/2017/1 “Quantum and Nonlinear Optics with Rydberg-State Atoms” by the Ministry of Education and Science of the Republic of Latvia, the Research Council of Lithuania, and the National Science Council of Taiwan (T.K., A.C., and M.A.) are also acknowledged. We wish to thank K. Bergmann and B. W. Shore for helpful discussions at the early stages of the work presented here.