Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 26: Ultracold atoms, ions, and BEC IV (joint session A/Q)

Q 26.7: Talk

Wednesday, March 11, 2020, 12:45–13:00, f303

Studies of circular Rydberg states in an ultracold atomic gas — •Christian Hölzl, Thomas Dieterle, Moritz Berngruber, Felix Engel, Robert Löw, Tilman Pfau, and Florian Meinert — 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology IQST, Universität Stuttgart

Hybrid systems of ions immersed in ultracold atomic gases provide appealing means for studies comprising cold collisions, ultracold chemistry, or strongly interacting impurities. Recently, we have demonstrated a new approach for embedding a single ionic impurity into a Bose-Einstein condensate exploiting a highly excited Rydberg atom [1,2]. Here, the Rydberg core acts as a sub-µK cold ion while the Rydberg electron protects the ion from detrimental stray electric fields. In this context, circular Rydberg states are appealing candidates to improve on lifetimes of the impurity. We will present the status of our work to access circular Rydberg states from an ultracold Rubidium sample.

[1] K. S. Kleinbach, F. Engel, T. Dieterle, R. Löw, T. Pfau, and F. Meinert, Phys. Rev. Lett. 120, 193401 (2018)

[2] F. Engel, T. Dieterle, T. Schmid, C. Tomschitz, C. Veit, N. Zuber, R. Löw, T. Pfau, and F. Meinert, Phys. Rev. Lett. 121, 193401 (2018).