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Solving problems related to two-dimensional force systems is an essential aspect of mechanics and engineering. By applying the principles of vector analysis and force equilibrium, one can determine the effect of multiple forces acting on an object in a two-dimensional space.
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Decoding active force fluctuations from spatial trajectories of active systems.

Anisha Majhi1, Biswajit Das1, Subhadeep Gupta2

  • 1Indian Institute of Science Education and Research, Department of Physical Sciences, Kolkata 741246, India.

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Summary
This summary is machine-generated.

Researchers developed a new method to accurately measure fluctuating active forces in mesoscopic systems by filtering out thermal noise. This technique aids in understanding force dynamics in living matter and estimating thermodynamic parameters.

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Area of Science:

  • Physics
  • Soft Matter Physics
  • Statistical Mechanics

Background:

  • Mesoscopic active systems display unique behaviors driven by constituent free energy conversion.
  • Estimating stochastic active forces, intertwined with thermal noise, is challenging in these systems.

Purpose of the Study:

  • To introduce a novel technique for accurately extracting fluctuating active forces from a passive particle in an active bath.
  • To filter out thermal noise for high statistical accuracy in force measurements.

Main Methods:

  • Numerical simulations were used to test the method's efficacy across various activity types.
  • The technique was applied to experimental trajectory data of a microparticle in an active bath of E. coli bacteria.

Main Results:

  • The method successfully extracts fluctuating active forces with high statistical accuracy.
  • Validation was performed using both numerical simulations and experimental data.

Conclusions:

  • The developed technique provides a simple yet powerful approach for measuring force dynamics in living matter.
  • This method can enable reliable estimation of thermodynamic parameters like heat, work, and entropy production.