Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 17: Ultra-cold atoms, ions and BEC (joint session A/Q)
Q 17.4: Vortrag
Montag, 11. März 2019, 17:00–17:15, S HS 1 Physik
Quench dynamics of Rydberg dressed atoms in two-dimensional optical lattices — •Yijia Zhou1 and Weibin Li1,2 — 1School of Physics and Astronomy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK — 2Centre for the Theoretical Physics and Mathematics of Quantum Non-equilibrium Systems, The University of Nottingham, Nottingham, NG7 2RD, UK
Recent experiments have demonstrated that long-range interactions can be induced by laser dressing ground state atoms to electronically excited Rydberg states. When trapped in optical lattices, this permits us to realize extended Bose-Hubbard models with tunable interactions. In this work, we study quench dynamics of the dressed atoms in a two-dimensional optical lattice. Here, by decreasing the lattice potential height, the tunneling rate increases from a Mott insulator to supersolid and then superfluid phases. Using a Gutzwiller approach, we find a sudden birth of superfluid order parameters after Mott-supersolid phase boundary. However, superfluid order parameter does not increase monotonically due to the supersolid phase as an intermediate state, which is largely affected by long-range interactions. The details of the exotic dynamics can be observed by, e.g., time-of-flight experiments. Our study paves a route to exploring non-equilibrium many-body physics with Rydberg dressed atoms in lattice systems.