Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 63: Poster – Quantum Information (joint session QI/Q)

Q 63.46: Poster

Donnerstag, 13. März 2025, 17:00–19:00, Tent

Off-resonant dipole-phonon interaction for quantum information processing with molecular rotors — •Leonel O. Stenkhoff, Monika Leibscher, and Christiane P. Koch — Freie Universität Berlin

Encoding quantum information in molecular ions requires a mechanism allowing for cooling and control of rotational quantum states. To this end, the dipole-phonon interaction of molecular and atomic ions co-trapped in a linear Paul trap is utilized. Resonant dipole interaction occurs when the rotational energy splitting is comparable to the eigenfrequency of a normal mode of the trap. Off-resonant dipole-phonon coupling scales with the trap frequency and the dipole moment of the molecule and can become the dominant part of the interaction if the molecule has a particular large dipole moment, as we demonstrate for the example of a trapped cytochrome complex. The prospects of cooling rotational quantum states via off-resonant dipole coupling are also discussed, which is particularly interesting for systems, where no resonant dipole-phonon interaction is observed in the range of achievable trap frequencies.

Keywords: Dipole-phonon interaction