Near-deterministic loading of molecular arrays by microwave-assisted collisions
Abstract
Molecular tweezer arrays offer great prospects for quantum simulation, sensing, and computing, and would benefit from methods that enhance loading efficiency. Whereas light-assisted collisions underpin enhanced loading methods for atomic tweezer arrays, this approach cannot be directly extended to molecular arrays due to collisional loss. We show how this collisional loss can be suppressed by shelving molecules in rotationally or vibrationally excited states, so that a shelved molecule interacts with a newly loaded molecule through a repulsive van der Waals interaction. By introducing microwave assisted collisions, we show how to control the final states and the energy released in a collision between a pair of molecules. Following this controlled collision, one of the two molecules can be ejected, and we explore several strategies for ensuring deterministic ejection. Our schemes rely on currently available techniques for laser-coolable molecules, and we predict achievable filling fractions up to 96%, paving the way for scalable molecular arrays.
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BibTeX
@misc{walraven2026neardeterministic,
title = {{Near-deterministic loading of molecular arrays by microwave-assisted collisions}},
author = {Etienne F. Walraven and Kang Feng and Jonas Rodewald and Michael R. Tarbutt and Tijs Karman},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2607.25783},
eprint = {2607.25783},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2607.25783},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Near-deterministic loading of molecular arrays by microwave-assisted collisions
AU - Etienne F. Walraven
AU - Kang Feng
AU - Jonas Rodewald
AU - Michael R. Tarbutt
AU - Tijs Karman
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2607.25783
UR - https://arxiv.org/abs/2607.25783
AB - Molecular tweezer arrays offer great prospects for quantum simulation, sensing, and computing, and would benefit from methods that enhance loading efficiency. Whereas light-assisted collisions underpin enhanced loading methods for atomic tweezer arrays, this approach cannot be directly extended to molecular arrays due to collisional loss. We show how this collisional loss can be suppressed by shelving molecules in rotationally or vibrationally excited states, so that a shelved molecule interacts with a newly loaded molecule through a repulsive van der Waals interaction. By introducing microwave assisted collisions, we show how to control the final states and the energy released in a collision between a pair of molecules. Following this controlled collision, one of the two molecules can be ejected, and we explore several strategies for ensuring deterministic ejection. Our schemes rely on currently available techniques for laser-coolable molecules, and we predict achievable filling fractions up to 96%, paving the way for scalable molecular arrays.
ER -