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Q: Fachverband Quantenoptik und Photonik
Q 2: Quantum Gases (Bosons) I
Q 2.4: Talk
Monday, March 14, 2022, 15:00–15:15, Q-H10
Extended Bose-Hubbard models with Rydberg macrodimer dressing — •Mathieu Barbier1, Simon Hollerith2, and Walter Hofstetter1 — 1Institut für theoretische Physik, Goethe Universität, 60438 Frankfurt am Main — 2Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
We propose dressing bosonic quantum gases dressed with macrodimer states - molecular bound states in Rydberg interaction potentials - as a promising approach for experimental observation of novel quantum phases such as supersolids. We investigate the scaling laws of the dressed interaction strength and the scattering rate with respect to the effective principal quantum number and trapping frequency of the ground state atoms for the molecular potentials of Rubidium and Potassium. Additionally, we propose a two-color excitation scheme which significantly increases the dressed interaction and cancels otherwise limiting AC Stark shifts. Furthermore, we study the corresponding extended Bose-Hubbard model within the Cluster Gutzwiller approach and compute the equilibrium phase diagram. By means of time-evolution simulations in the presence of realistic dissipation we investigate the possible preparation of supersolid phases and suggest a parameter regime for which, through ramping up to coupling to the macrodimer states, supersolid phases could be experimentally observable.