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@ARTICLE{Iyer:1009042,
      author       = {Iyer, Priyanka and Winkler, Roland G. and Fedosov, Dmitry
                      A. and Gompper, Gerhard},
      title        = {{D}ynamics and phase separation of active {B}rownian
                      particles on curved surfaces and in porous media},
      journal      = {Physical review research},
      volume       = {5},
      number       = {3},
      issn         = {2643-1564},
      address      = {College Park, MD},
      publisher    = {APS},
      reportid     = {FZJ-2023-02594},
      pages        = {033054},
      year         = {2023},
      abstract     = {The effect of curvature on an ensemble of repulsive active
                      Brownian particles (ABPs) moving on a spherical surface is
                      studied. Surface curvature strongly affects the dynamics of
                      ABPs, as it introduces a new time scale τ=R/v0, with
                      curvature radius R and propulsion velocity v0, in addition
                      to the rotational diffusion time τr. The time scale τ is
                      related to a stop-and-go motion caused by the recurrent
                      alignment of the propulsion direction with the surface
                      normal. This implies that motility-induced phase separation
                      (MIPS) disappears for small R. Furthermore, it causes a
                      narrowing of the MIPS regime in the phase diagram of
                      P{'e}clet number Pe and particle area fraction ϕ. Also, the
                      phase-separation boundary at low ϕ attains a turning point
                      at small R, allowing for the possibility of a reentrant
                      behavior. For a system of two pores with unequal radii
                      connected by a small passage, the density in each pore is
                      found to be inversely proportional to local particle
                      mobility. Notably, this relation breaks down when MIPS
                      occurs in either sphere or when the noise is high. ABPs move
                      against the density gradient owing to their spatially
                      varying velocity. The magnitude of the directional flux from
                      one pore to the other is proportional to the particles
                      effective diffusion constant in the pore. Moreover,
                      fluctuations in the number of ABPs within the pores near the
                      MIPS transition are found to induce transient MIPS states.},
      cin          = {IBI-5 / IAS-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IBI-5-20200312 / I:(DE-Juel1)IAS-2-20090406},
      pnm          = {5243 - Information Processing in Distributed Systems
                      (POF4-524)},
      pid          = {G:(DE-HGF)POF4-5243},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001050236900004},
      doi          = {10.1103/PhysRevResearch.5.033054},
      url          = {https://juser.fz-juelich.de/record/1009042},
}