Abstract
Electromagnetically induced transparency (EIT) is a 3-level quantum interference phenomenon. The usual theoretical calculations of EIT neglect the degenerate Zeeman sublevels. The results of these calculations cannot explain the observed spectra in our experiment and cannot provide any information about laser polarizations. In this work, we study how the Zeeman sublevels influence the EIT spectra. We develop a theoretical calculation that considers all Zeeman sublevels and perform the EIT experiment with laser-cooled rubidium (Rb) atoms to verify this theoretical calculation.