SAMOP 2023 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Poster II

A 20.27: Poster

Mittwoch, 8. März 2023, 16:30–19:00, Empore Lichthof

Vibrational energy transfer between trapped atoms via Rydberg Excitation — •Abhijit Pendse¹, Sebastian Wüster², Matthew Eiles¹, and Alexander Eisfeld¹ — ¹Max Planck Institute for the Physics of Complex Systems, Dresden, Germany — ²Indian Institute of Science Education and Research (IISER), Bhopal, India

The study of heat transfer between spatially separated ultracold atoms serves as a fundamental probe of thermodynamics of mesoscopic quantum systems [1,2]. To study the basic dynamics of this heat transfer, we consider three collinear harmonically trapped ultracold atoms. Coupling the central atom to a high-lying Rydberg s-state (l=0) creates interactions in the system due to scattering of trapped atoms by the Rydberg electron. We numerically study the exact dynamics of an excited oscillator state in this Rydberg-coupled system. It turns out that the time scale of excitation transfer dynamics is smaller than the lifetime of the Rydberg state thus enabling experimental observation. The weak excitation of the central Rydberg atom, when the Rydberg electron-atom interaction energy becomes comparable to the oscillator energy, is an interesting feature of the system dynamics. As the harmonic trapping frequency of the Rydberg excited atom is increased with respect to that of other two atoms, the probability of multi-phonon excitation transfer increases.

References :

[1] Giazotto, et al. (2006), Rev. Mod. Phys., 78 (1), 217.

[2] Charalambous, et al. (2019), N. J. Phys., 21(8), 083037.