Group seminar at MPQ and Zoom: Exploring the dynamics of many-body spin systems on a tunable Rydberg-atom quantum simulator

April 30, 2024

Sebastian Geier, Universität Heidelberg
Group seminar at MPQ lecture hall and Zoom
Tuesday, April 30,  09:00 am (MEZ)

Rydberg atoms have emerged as a prominent platform to investigate quantum many-body systems across diverse scenarios. In this talk, I will present our approaches to perform tunable quantum simulations in an isolated many-body spin-1/2 system represented by dipolar interacting Rydberg atoms. These approaches are further employed to study out-of-equilibrium dynamics in different regimes. First, by selecting various spin encoding states within the Rydberg manifold, we realize XX, XXZ, and Ising models with spatial disorder and study magnetization relaxation dynamics. We identify dynamics that are independent of the underlying Hamiltonian and that are well-explained by the emergence of effective spin pairs. Second, I will discuss how a time-periodic drive transforms a naturally given interaction Hamiltonian into a desired target form and demonstrate its potential for tunable quantum simulation of spin models by altering symmetry and transport properties. Third, I will present a method for implementing a time-reversal protocol by coherently switching the spin encoding Rydberg states. The versatility of the method is demonstrated by reversing quantum dynamics for a variety of many-body Hamiltonian with tunable symmetry. Finally, I will discuss how one can introduce mobile dopants into these quantum magnets.

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