@article{Narinder2021fluct-55192,
  year={2021},
  doi={10.1103/PhysRevE.104.034605},
  title={Work fluctuation relation of an active Brownian particle in a viscoelastic fluid},
  number={3},
  volume={104},
  issn={2470-0045},
  journal={Physical Review E},
  author={Narinder, Narinder and Paul, Shuvojit and Bechinger, Clemens},
  note={Article Number: 034605}
}

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    <dcterms:title>Work fluctuation relation of an active Brownian particle in a viscoelastic fluid</dcterms:title>
    <dc:creator>Narinder, Narinder</dc:creator>
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    <dcterms:abstract xml:lang="eng">We experimentally investigate the work fluctuations of an active Brownian particle (ABP) during its self-propelled motion in a viscoelastic medium. Under such conditions, ABPs display a persistent circular motion which allows the determination of the orientational work fluctuations along its trajectory. Due to the nonlinear coupling to the non-Markovian bath, we find strong deviations from the work fluctuation theorem (WFT) due to observed increased rotational ABP dynamics. Taking this enhanced rotational diffusion into account, the orientational work distributions can be recasted to be in accordance with the WFT by considering an effective temperature of about two orders of magnitude larger than kBT. This approach is confirmed by the good agreement of the torque exerted by the viscoelastic bath on the ABP obtained from the WFT with the value obtained from the mean angular velocity and the friction coefficient of the ABP.</dcterms:abstract>
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