Rotational-state dependence of interactions between polar molecules
- URL: http://arxiv.org/abs/2401.05958v4
- Date: Wed, 15 May 2024 14:53:54 GMT
- Title: Rotational-state dependence of interactions between polar molecules
- Authors: Etienne F. Walraven, Tijs Karman,
- Abstract summary: We show that where molecules are in rotational states that differ by more than one quantum, they exhibit repulsive van der Waals interactions.
At temperatures below a millikelvin, this effect can reduce collisional loss by multiple orders of magnitude.
These repulsive interactions lead to applications in quantum simulation and impurity physics with ultracold polar molecules.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The long-range electrostatic interactions between molecules depend strongly on their relative orientation, which manifests as a rotational state dependence. Interactions between molecules in the same rotational quantum state are well-known attractive rotational van der Waals interactions. Interactions in rotational states that differ by one quantum show resonant dipole-dipole interactions. We show that where molecules are in rotational states that differ by more than one quantum, they exhibit repulsive van der Waals interactions. At temperatures below a millikelvin, this effect can reduce collisional loss by multiple orders of magnitude. These repulsive interactions lead to applications in quantum simulation and impurity physics with ultracold polar molecules.
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