%0 Journal Article %1 vulpiofdt2007 %A Puglisi, A. %A A.Baldassarri, %A A.Vulpiani, %D 2007 %J J. Stat. Mech. %K 2007 fdt fluids gases granular myown puglisi simulation violation vulpiani %P P08016 %T Violation of the Einstein relation in Granular Fluids: the role of correlations %U http://www.iop.org/EJ/abstract/1742-5468/2007/08/P08016 %X We study the linear response in different models of driven granular gases. In some situations, even if the velocity statistics can be strongly non-Gaussian, we do not observe appreciable violations of the Einstein formula for diffusion versus mobility. The situation changes when strong correlations between velocities and density are present: in this case, although a form of fluctuation-dissipation relation holds, the differential velocity response of a particle and its velocity self-correlation are no longer proportional. This happens at high densities and strong inelasticities, but still in the fluid-like (and ergodic) regime.

@article{vulpiofdt2007, abstract = {We study the linear response in different models of driven granular gases. In some situations, even if the velocity statistics can be strongly non-Gaussian, we do not observe appreciable violations of the Einstein formula for diffusion versus mobility. The situation changes when strong correlations between velocities and density are present: in this case, although a form of fluctuation-dissipation relation holds, the differential velocity response of a particle and its velocity self-correlation are no longer proportional. This happens at high densities and strong inelasticities, but still in the fluid-like (and ergodic) regime.}, added-at = {2008-01-09T17:13:02.000+0100}, author = {Puglisi, A. and A.Baldassarri and A.Vulpiani}, biburl = {https://www.bibsonomy.org/bibtex/251ebe0693dff4a5b9200e7d57bca0466/andreab}, interhash = {e84b843b181669dfc03a07428eb41947}, intrahash = {51ebe0693dff4a5b9200e7d57bca0466}, journal = {J. Stat. Mech.}, keywords = {2007 fdt fluids gases granular myown puglisi simulation violation vulpiani}, month = {August}, pages = {P08016}, timestamp = {2008-01-09T17:13:03.000+0100}, title = {Violation of the Einstein relation in Granular Fluids: the role of correlations}, url = {http://www.iop.org/EJ/abstract/1742-5468/2007/08/P08016}, year = 2007 }