Dynamical bath control with localized impurities in a quantum gas (A04)

• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas ; Theoretical Condensed Matter Physics
• Term: since 2016
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 277625399

Individual atomic impurities in a quantum gas form a paradigm of quantum physics. This project aims at experimentally realizing and theoretically modelling and controlling the decoherence dynamics of individual impurities in a Bose-Einstein condensate. We will particularly reconstruct the spectral function of the bath and engineer it via tailoring of the bath. Furthermore, we will consider an impurity in a spin-full bath to study the competition between decoherence and thermalization in a dissipative system. Finally, we will study the transition to a non-Markov bath, retaining memory of the past. These aims will be complemented by external periodic drive of the interaction strength to obtain nonequilibrium control of this paradigmatic model.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 185: OSCAR - Open System Control of Atomic and Photonic Matter
• Applicant Institution: Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau
• Project Heads: Dr. Imke Schneider; Professor Dr. Artur Widera