Structural reconfiguration of interacting multi-particle systems through parametric pumping

Qinghao Mao (), Brady Wu, Bryan VanSaders and Heinrich M. Jaeger
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Qinghao Mao: University of Chicago
Brady Wu: University of Chicago
Bryan VanSaders: University of Chicago
Heinrich M. Jaeger: University of Chicago

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract Processes from crystallization to protein folding to micro-robot self-assembly rely on achieving specific configurations of microscopic objects with short-ranged interactions. However, the small scales and large configuration spaces of such multi-body systems render targeted control challenging. Inspired by optical pumping manipulation of quantum states, we develop a method using parametric pumping to selectively excite and destroy undesired structures to populate the targeted one. This method does not rely on free energy considerations and therefore works for systems with non-conservative and even non-reciprocal interactions, which we demonstrate with an acoustically levitated five-particle system in the Rayleigh limit. With results from experiments and simulations on three additional systems ranging up to hundreds of particles, we show the generality of this method, offering a new path for non-invasive manipulation of strongly interacting multi-particle systems.

Date: 2025
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DOI: 10.1038/s41467-025-59631-3

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