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Single active particle engine utilizing a nonreciprocal coupling between particle position and self-propulsion.

Grzegorz Szamel1

  • 1Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.

Physical Review. E
|November 20, 2020
PubMed
Summary
This summary is machine-generated.

We demonstrate how nonreciprocal coupling enables work extraction from a single self-propelled particle at constant temperature. This method utilizes aligning interactions to control particle position and self-propulsion correlations.

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Area of Science:

  • Physics
  • Statistical Mechanics
  • Soft Matter Physics

Background:

  • Self-propelled particles exhibit complex behaviors analogous to living systems.
  • Nonreciprocal interactions are crucial for understanding active matter dynamics.
  • Previous work established a formal equivalence between self-propelled particles and two coupled subsystems.

Purpose of the Study:

  • To investigate the possibility of extracting useful work from a single self-propelled particle.
  • To explore the role of nonreciprocal coupling in energy transduction in active matter.
  • To demonstrate a method for controlling particle dynamics to achieve directed work output.

Main Methods:

  • Theoretical modeling of a single self-propelled particle system.
  • Introduction of a nonreciprocal coupling mechanism.
  • Utilizing an aligning interaction to correlate particle position and self-propulsion.
  • Maintaining the system at a constant temperature.

Main Results:

  • Demonstrated that nonreciprocal coupling enables useful work extraction from a single active particle.
  • Showed that aligning interactions can control particle position and self-propulsion correlations.
  • Established a pathway for energy harvesting from systems of active matter.
  • Quantified the work output achievable under specific conditions.

Conclusions:

  • Nonreciprocal interactions provide a mechanism for work extraction in active matter systems.
  • Controlling correlations between particle motion and internal dynamics is key to harnessing energy.
  • This work opens avenues for designing novel micro- and nanomachines powered by thermal fluctuations and active processes.