Related papers: Observation of resonant monopole-dipole energy transfer between Rydberg atoms and polar molecules

Observation of resonant monopole-dipole energy transfer between Rydberg atoms and polar molecules

URL: http://arxiv.org/abs/2509.21582v1
Date: Thu, 25 Sep 2025 20:57:43 GMT
Title: Observation of resonant monopole-dipole energy transfer between Rydberg atoms and polar molecules
Authors: J. Zou, R. R. W. Wang, R. González-Férez, H. R. Sadeghpour, S. D. Hogan,
Abstract summary: Rydberg levels in helium have been observed in low-temperature collisions with ammonia molecules.<n>This hybrid Rydberg-atom polar-molecule represents a monopole-dipole energy exchange reaction.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Resonant energy transfer (RET), between equal parity 1s65s$^3\mathrm{S}_1$ and 1s66s$^3\mathrm{S}_1$ Rydberg levels in helium has been observed in low-temperature ($\sim80$ mK) collisions with ammonia molecules which undergo inversion transitions in their X$^1$A$_1$ ground electronic state. This hybrid Rydberg-atom polar-molecule RET represents a monopole-dipole energy exchange reaction that necessarily requires spatial overlap of the Rydberg-electron and molecular wavefunctions. Calculations, explicitly accounting for the charge-dipole interaction between the Rydberg electron and the molecular dipole, provide a quantitative explanation of the observations. Total parity is conserved in the reaction through the mixing of collisional angular momentum in the atom-molecule complex. This work opens opportunities to expand the toolbox of hybrid neutral-atom polar-molecule platforms for quantum science with charge-dipole mediated energy exchange.

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