Erlangen 2022 – scientific programme
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A: Fachverband Atomphysik
A 33: Rydberg Systems (joint session Q/A)
A 33.5: Talk
Friday, March 18, 2022, 11:30–11:45, Q-H14
Quantum transport enabled by non-adiabatic transitions — Ajith Ramachandran1, Alexander Eisfeld2, •Sebastian Wüster1, and Jan-Michael Rost2 — 1Indian Institute of Science Education and Research, Bhopal — 2Max Planck Institute for the Physics of Complex Systems, Dresden
Quantum transport of charge or energy in networks with discrete sites is a core feature of diverse prospective quantum technologies, from molecular electronics over excited atoms to photonic metamaterials. In many of these examples, transport can be affected by motion of the sites or coupling to phonons.
The Born-Oppenheimer surfaces of the hybrid Rydberg chain with side-unit (Fano-Anderson chain), are shown to inherit characteristics from both constituents: A dense exciton band from the regular chain with added avoided crossings or conical intersections. Using time dependent quantum wave packets, we demonstrate that these features enable a setting in which only a mobile, symmetric side unit permits quantum transport on the regular chain, while transport is blocked without motion or for a distorted side unit [1]. This provides an example for functional synthetic Born-Oppenheimer surfaces with possible uses for temperature sensing in molecular electronics, through the sensitive linkage between molecular motion and quantum transport [2].
[1] A. Ramachandran, A. Eisfeld, S. Wüster, J. M. Rost; ArXiv (2022).
[2] A. Ramachandran, M. Genkin, A. Sharma, A. Eisfeld, S. Wüster, J. M. Rost; PRA 104 (2021) 042219.