1.
Phys Rev Lett
; 123(15): 159901, 2019 Oct 11.
Artículo
en Inglés
| MEDLINE
| ID: mdl-31702299
RESUMEN
This corrects the article DOI: 10.1103/PhysRevLett.121.163603.
2.
Phys Rev Lett
; 121(16): 163603, 2018 Oct 19.
Artículo
en Inglés
| MEDLINE
| ID: mdl-30387648
RESUMEN
We demonstrate lasing into counterpropagating modes of a ring cavity using a gas of cold atoms as a gain medium. The laser operates under the usual conditions of magneto-optical trapping with no additional fields. We characterize the threshold behavior of the laser and measure the second-order optical coherence. The laser emission exhibits directional bistability, switching randomly between clockwise and counterclockwise modes, and a tunable nonreciprocity is observed as the atoms are displaced along the cavity axis.