SKM 2023 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 55: Dynamics and Chaos in Many-Body Systems II (joint session DY/TT)
DY 55.11: Vortrag
Freitag, 31. März 2023, 12:15–12:30, MOL 213
Tailoring the Phonon Environment of Embedded Rydberg Aggregates — •Sidharth Rammohan1, Sebastian Wüster1, and Alexander Eisfeld2 — 1IISER Bhopal, Madhya Pradesh, India — 2MPIPKS, Dresden, Germany
State-of-the-art experiments can controllably create Rydberg atoms inside a Bose-Einstein condensate (BEC) such that the Rydberg electron orbital volume contains many neutral atoms, which can be tuned, resulting in electron-atom scattering events [1]. In my talk, I will discuss the physics of the interaction and corresponding dynamics of a single or multiple Rydberg atoms in two internal electronic states embedded inside a BEC, to assess their utility for controlled studies of decoherence and quantum simulations of excitation transport similar to photosynthetic light-harvesting. We initially developed a theoretical framework to calculate the open quantum system input parameters for a single Rydberg atom, possibly in two internal states, in BEC and then for a chain of Rydberg atoms, forming an aggregate [2]. The electron-atom interactions lead to Rydberg-BEC coupling, creating phonons in the BEC. Using the spin-boson model with the calculated parameters, we then examine the decoherence and the Non-Markovian features of a Rydberg atom in a superposition, resulting from the interaction with the environment [3]. The scenario with a single Rydberg atom is then extended to the aggregate case, allowing us to set up dynamics similar to those found in light-harvesting complexes. Ref:1. J. B. Balewski, et.al; Nature 502 664 (2013).2. S. Rammohan, et.al; PRA 103, 063307 (2021).3. S. Rammohan, et.al; PRA 104, L060202 (2021).