Collective strong coupling of cold potassium atoms in a ring cavity

Research output: Contribution to journalArticle


  • Robert Culver
  • Andreas Lampis
  • Balázs Megyeri
  • Lawrence Mudarikwa
  • Philippe Courteille

Colleges, School and Institutes


We present experiments on ensemble cavity quantum electrodynamics with cold potassium atoms in a high-finesse ring cavity. Potassium-39 atoms are cooled in a two-dimensional magneto-optical trap and transferred to a three-dimensional trap which intersects the cavity mode. The apparatus is described in detail and the first observations of strong coupling with potassium atoms are presented. Collective strong coupling of atoms and light is demonstrated via the splitting of the cavity transmission spectrum and the avoided crossing of the normal modes.


Original languageEnglish
Article number113043
JournalNew Journal of Physics
Publication statusPublished - 24 Nov 2016