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Hamiltonian active particles in an environment.

Diego M Fieguth1, Timo Schlachter1, Daniel S Brady1

  • 1State Research Center OPTIMAS and Fachbereich Physik, Technische Univerität Kaiserslautern, D-67663 Kaiserslautern, Germany.

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This summary is machine-generated.

Active particles harness internal fuel to move against forces in noisy environments. Surprisingly, environmental dissipation aids particle activity and stability, suggesting a reliance on external factors for control.

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Area of Science:

  • Physics
  • Statistical Mechanics
  • Biophysics

Background:

  • Active particles generate motion by consuming internal energy reserves.
  • These particles operate in environments characterized by noise and dissipation.
  • Understanding the interplay between internal energy and external forces is crucial.

Purpose of the Study:

  • To investigate a Hamiltonian system modeling an active particle.
  • To analyze how an active particle interacts with a noisy and dissipative environment.
  • To determine the role of dissipation in the particle's dynamics and stability.

Main Methods:

  • Modeling the active particle and its fuel depot as two subsystems.
  • Employing Hamiltonian mechanics to describe the system's dynamics.
  • Analyzing the influence of environmental noise and dissipation on particle motion.

Main Results:

  • The active particle expends energy against external forces using its internal fuel.
  • Despite energy loss to dissipation, the environment can stabilize the particle's active motion.
  • Dissipation plays a dual role, contributing to energy loss and dynamical stabilization.

Conclusions:

  • Active particles can function effectively in dissipative and noisy conditions.
  • Environmental dissipation may be essential for the control and stability of active particle mechanisms.
  • This suggests a potential co-dependence between active particles and their surrounding environments.