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Q: Fachverband Quantenoptik und Photonik
Q 32: Ultra-cold atoms, ions and BEC II (joint session A/Q)
Q 32.5: Talk
Wednesday, March 16, 2022, 11:30–11:45, A-H2
Dynamics of atoms within atoms — •Shiva Kant Tiwari1, Felix Engel2, Marcel Wagner3,4, Richard Schmidt3,4, Florian Meinert2, and Sebastian Wüster1 — 1Department of Physics, Indian Institute of Science Education and Research, Bhopal, Madhya Pradesh 462 066, India — 2Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany — 3Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany — 4Munich Center for Quantum Science and Technology (MCQST), Schellingstr. 4, D-80799 München, Germany
Recent experiments with Bose-Einstein condensates have entered a regime in which thousands of ground-state condensate atoms fill the Rydberg-electron orbit. After the excitation of a single atom into a highly excited Rydberg state, scattering off the Rydberg electron sets ground-state atoms into motion, such that one can study the quantum-many-body dynamics of atoms moving within the Rydberg atom. Here we study this many-body dynamics using Gross-Pitaevskii and truncated Wigner theory. Our simulations focus in particular on the scenario of multiple sequential Rydberg excitations on the same Rubidium condensate which has become the standard tool to observe quantum impurity dynamics in Rydberg experiments. We investigate to what extent such experiments can be sensitive to details in the electron-atom interaction potential, such as the rapid radial modulation of the Rydberg molecular potential, or p-wave shape resonance. Finally, we explore the local dynamics of condensate heating.