TY - JOUR
T1 - Equivalence of Fluctuation-Dissipation and Edwards' Temperature in Cyclically Sheared Granular Systems
AU - Zeng, Zhikun
AU - Zhang, Shuyang
AU - Zheng, Xu
AU - Xia, Chengjie
AU - Kob, Walter
AU - Yuan, Ye
AU - Wang, Yujie
N1 - Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/11/23
Y1 - 2022/11/23
N2 - Using particle trajectory data obtained from x-ray tomography, we determine two kinds of effective temperatures in a cyclically sheared granular system. The first one is obtained from the fluctuation-dissipation theorem which relates the diffusion and mobility of lighter tracer particles immersed in the system. The second is the Edwards compactivity defined via the packing volume fluctuations. We find robust agreement between these two temperatures, independent of the type of the tracers, cyclic shear amplitudes, and particle surface roughness, giving therefore the first experimental evidence that the concept of effective temperature is valid in driven frictional granular systems.
AB - Using particle trajectory data obtained from x-ray tomography, we determine two kinds of effective temperatures in a cyclically sheared granular system. The first one is obtained from the fluctuation-dissipation theorem which relates the diffusion and mobility of lighter tracer particles immersed in the system. The second is the Edwards compactivity defined via the packing volume fluctuations. We find robust agreement between these two temperatures, independent of the type of the tracers, cyclic shear amplitudes, and particle surface roughness, giving therefore the first experimental evidence that the concept of effective temperature is valid in driven frictional granular systems.
UR - https://www.scopus.com/pages/publications/85143422977
U2 - 10.1103/PhysRevLett.129.228004
DO - 10.1103/PhysRevLett.129.228004
M3 - 文章
C2 - 36493438
AN - SCOPUS:85143422977
SN - 0031-9007
VL - 129
JO - Physical Review Letters
JF - Physical Review Letters
IS - 22
M1 - 228004
ER -