Events at Physics
In my talk I will present the experimental setup built at The Open University, UK to investigate the ultracold Rydberg atoms. I will show our first results of the measurements of the dipole moments for the transitions to the Rydberg states by investigation of the electromagnetically induced transparency (EIT) in ultracold 87Rb gas. The absorption profile of a weak probe laser beam on 5S1/2 → 5P3/2 transition is observed in the presence of a strong coupling laser beam at 480 nm driving the 5P3/2 → nD5/2 transition for the Rydberg states with principal quantum numbers in the range 20≤n≤48. The strong dependence of the shape of the EIT spectrum on the Rabi frequency of the transition between the first excited state and Rydberg states allowed us to directly measure the dipole moments of the transitions involved for several values of principal number n.
The dipole matrix elements for transitions measured in our experiment are compared with theoretical methods including quasiclassical calculations based on Dyachkov-Pankratov model, and Coulomb approximations. A very good agreement with the theoretical calculations is observed.
I will conclude the talk with the outline of further projects with ultracold Rydberg atoms that are carried out at the Open University.