Experimental Quenching of Harmonic Stimuli: Universality of Linear Response Theory

被引:30
作者
Allegrini, Paolo [1 ,2 ]
Bologna, Mauro [3 ,4 ]
Fronzoni, Leone [1 ,2 ]
Grigolini, Paolo [1 ,2 ,3 ,5 ]
Silvestri, Ludovico [1 ,2 ,6 ]
机构
[1] Univ Pisa, Dipartimento Fis E Fermi, I-56127 Pisa, Italy
[2] INFM, CRS SOFT, I-56127 Pisa, Italy
[3] Univ N Texas, Ctr Nonlinear Sci, Denton, TX 76203 USA
[4] Univ Tarapaca, Inst Alta Invest, Arica, Chile
[5] CNR, Ist Proc Chim Fis, Area Ric Pisa, I-56124 Pisa, Italy
[6] Univ Florence, LENS, I-56124 Sesto Fiorentino, FI, Italy
关键词
D O I
10.1103/PhysRevLett.103.030602
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that liquid crystals in the weak turbulence electroconvective regime respond to harmonic perturbations with oscillations whose intensity decay with an inverse power law of time. We use the results of this experiment to prove that this effect is the manifestation of a form of linear response theory (LRT) valid in the out-of-equilibrium case, as well as at thermodynamic equilibrium where it reduces to the ordinary LRT. We argue that this theory is a universal property, which is not confined to physical processes such as turbulent or excitable media, and that it holds true in all possible conditions, and for all possible systems, including complex networks, thereby establishing a bridge between statistical physics and all the fields of research in complexity.
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页数:4
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