Phys.org  September 29, 2023
An international team of researchers (Japan, Germany) has reported the observation and control of ultrafast many-body dynamics of electrons in ultracold Rydberg-excited atoms, spatially ordered in a three-dimensional Mott insulator (MI) with unity filling in an optical lattice. By mapping out the time-domain Ramsey interferometry in the picosecond timescale, they could deduce entanglement growth indicating the emergence of many-body correlations via dipolar forces. They analyzed the observations with different theoretical approaches and found that the semiclassical model broke down, indicating that quantum fluctuations play a decisive role in the observed dynamics. Combining picosecond Rydberg excitation with MI lattice thus provided a platform for simulating nonequilibrium dynamics of strongly correlated systems in synthetic ultracold atomic crystals, such as in a metal-like quantum gas regime… read more. TECHNICAL ARTICLE
(a) Experimental schematic… Credit: Phys. Rev. Lett. 131, 123201, 22 September 2023Â