Related papers: $In$ $situ$ observation of non-polar to strongly polar atom-ion collision dynamics

$In$ $situ$ observation of non-polar to strongly polar atom-ion collision dynamics

URL: http://arxiv.org/abs/2401.12312v1
Date: Mon, 22 Jan 2024 19:16:54 GMT
Title: $In$ $situ$ observation of non-polar to strongly polar atom-ion collision dynamics
Authors: Moritz Berngruber, Daniel J. Bosworth, Oscar A. Herrera-Sancho, Viraatt S. V. Anasuri, Nico Zuber, Frederic Hummel, Jennifer Krauter, Florian Meinert, Robert L\"ow, Peter Schmelcher and Tilman Pfau
Abstract summary: Collision dynamics between an ion and a Rydberg atom is studied in a regime characterized by a multitude of collision channels. The interaction potentials formed by the polar Stark states show a substantial difference in spatial gradient compared to the non-polar state. For collision energies in the range of $k_textrmBcdotmu$K to $k_textrmBcdot$K, the dynamics exhibit a counter-intuitive dependence on temperature.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: The onset of collision dynamics between an ion and a Rydberg atom is studied in a regime characterized by a multitude of collision channels. These channels arise from coupling between a non-polar Rydberg state and numerous highly polar Stark states. The interaction potentials formed by the polar Stark states show a substantial difference in spatial gradient compared to the non-polar state leading to a separation of collisional timescales, which is observed in situ. For collision energies in the range of $k_\textrm{B}\cdot\mu$K to $k_\textrm{B}\cdot$K, the dynamics exhibit a counter-intuitive dependence on temperature, resulting in faster collision dynamics for cold - initially "slow" - systems. Dipole selection rules enable us to prepare the collision pair on the non-polar potential in a highly controlled manner, which determines occupation of the collision channels. The experimental observations are supported by semi-classical simulations, which model the pair state evolution and provide evidence for tunable non-adiabatic dynamics.

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