Effective Temperature of Red-Blood-Cell Membrane Fluctuations

被引：122

作者：

Ben-Isaac, Eyal ^{[1
]}

Park, YongKeun ^{[2
]}

Popescu, Gabriel ^{[3
]}

Brown, Frank L. H. ^{[4
,5
]}

Gov, Nir S. ^{[1
]}

Shokef, Yair ^{[6
]}

机构：

[1] Weizmann Inst Sci, Dept Chem Phys, IL-76100 Rehovot, Israel

[2] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea

[3] Univ Illinois, Beckman Inst Adv Sci & Technol, Dept Elect & Comp Engn, Quantitat Light Imaging Lab, Urbana, IL 61801 USA

[4] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

[5] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[6] Weizmann Inst Sci, Dept Mat & Interfaces, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 23期

基金：

美国国家科学基金会;

关键词：

MECHANICS;

D O I：

10.1103/PhysRevLett.106.238103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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