2011/02/28 by Eyal Ben-Isaac, YongKeun Park, Gabriel Popescu +3
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Lipid Membrane Structure and Behavior #Micro and Nano Robotics #cond-mat.soft #cond-mat.stat-mech #physics.bio-ph
paper · pdf · doi:10.1103/physrevlett.106.238103
published as Phys. Rev. Lett. 106, 238103 (2011) · 5 pages, 4 figures, Supplementary Information at http://www.weizmann.ac.il/~feshokef/rbc.html
arxiv created 2011/05/04 · openalex publication_date 2011/06/08 · arxiv updated 2011/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Biologically driven nonequilibrium fluctuations are often characterized by their non-Gaussianity or by an "effective temperature", which is frequency dependent and higher than the ambient temperature. We address these two measures theoretically by examining a randomly kicked particle, with a variable number of kicking motors, and show how these two indicators of nonequilibrium behavior can contradict. Our results are compared with new experiments on shape fluctuations of red-blood cell membranes, and demonstrate how the physical nature of the motors in this system can be revealed using these global measures of nonequilibrium.