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Structural reconfiguration of interacting multi-particle systems through parametric pumping.

Qinghao Mao1,2, Brady Wu3,4, Bryan VanSaders4

  • 1Department of Physics, University of Chicago, Chicago, IL, USA. qinghaomao@uchicago.edu.

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This study introduces parametric pumping to control microscopic particle configurations. This novel method selectively removes unwanted structures, enabling precise self-assembly and manipulation in complex systems.

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Area of Science:

  • Physics
  • Materials Science
  • Robotics

Background:

  • Controlling configurations of microscopic objects with short-ranged interactions is crucial for processes like crystallization and self-assembly.
  • The small scales and vast configuration spaces of multi-body systems present significant challenges for targeted manipulation.

Purpose of the Study:

  • To develop a novel method for the selective control and manipulation of microscopic particle configurations.
  • To demonstrate a technique applicable to systems with non-conservative and non-reciprocal interactions.

Main Methods:

  • Utilizing parametric pumping, inspired by optical pumping in quantum mechanics, to selectively excite and destroy undesired structures.
  • Applying the method to an acoustically levitated five-particle system in the Rayleigh limit.
  • Validating the technique through experiments and simulations on systems with up to hundreds of particles.

Main Results:

  • Successfully demonstrated selective population of targeted configurations by eliminating undesired ones.
  • Showcased the method's efficacy in systems with non-conservative and non-reciprocal interactions.
  • Confirmed the generality of the parametric pumping approach across various multi-particle systems.

Conclusions:

  • Parametric pumping offers a new, non-invasive pathway for manipulating strongly interacting multi-particle systems.
  • The method's independence from free energy considerations broadens its applicability.
  • This technique holds potential for advancing fields requiring precise control over micro-scale assemblies.