# Regensburg 2019 – wissenschaftliches Programm

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# DY: Fachverband Dynamik und Statistische Physik

## DY 16: Quantum Dynamics, Decoherence and Quantum Information

### DY 16.5: Vortrag

### Dienstag, 2. April 2019, 11:00–11:15, H6

**Engineering thermal reservoirs for ultracold dipole-dipole-interacting Rydberg atoms** — David Schönleber, Chris Bentley, and •Alex Eisfeld — MPI-PKS Dresden

We consider an open quantum system of ultracold Rydberg atoms. The system part consists of resonant dipole-dipole-interacting Rydberg states. The environment part is formed by ’three-level atoms’: each atom has a ground state, a short-lived excited state, and a Rydberg state that interacts with the system states. The two transitions in the environment atoms are optically driven, and provide control over the environment dynamics [1]. Appropriate choice of the laser parameters allows us to prepare a Boltzmann distribution of the system’s eigenstates. By tuning the laser parameters and system-environment interaction, we can change the temperature associated with this Boltzmann distribution, and also the thermalization dynamics [2]. The correct parameters are obtained via machine-learning techniques [3]. Our method provides novel opportunities for quantum simulation of thermalization dynamics using ultracold Rydberg atoms.

[1] Phys. Rev. Lett. 114 123005 (2015) [2] New J. Phys. 20, 013011 (2018) [3] J. Phys. B 51, 205003 (2018)