Zobrazeno 41 - 50
of 1 963
pro vyhledávání: '"Ruocco G"'
Implications of reduction procedures applied to the low energy part of the vibrational density of states in glasses and supercooled liquids are considered by advancing a detailed comparison between the excess - over the Debye limit - vibrational dens
Externí odkaz:
http://arxiv.org/abs/cond-mat/0602148
The acoustic sound dispersion of nitrogen in its liquid and supercritical phases has been studied by Inelastic X-Ray Scattering. Approaching supercritical conditions, the gradual disappearance of the positive sound dispersion, characteristic of the l
Externí odkaz:
http://arxiv.org/abs/cond-mat/0512383
Publikováno v:
Phys. Rev. Lett. 96, 065702 (2006)
We study the nonlinear dynamics of a multi-mode random laser using the methods of statistical physics of disordered systems. A replica-symmetry breaking phase transition is predicted as a function of the pump intensity. We thus show that light propag
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511427
The phase diagram of a charged colloidal system (Laponite) has been investigated by dynamic light scattering in a previously unexplored range of salt and clay concentrations. Specifically the clay weight and salt molar concentrations have been varied
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509235
Publikováno v:
Phys. Rev. E 72, 016122 (2005)
We address the question of the quantitative relationship between thermodynamic phase transitions and topological changes in the potential energy manifold analyzing two classes of one dimensional models, the Burkhardt solid-on-solid model and the Peyr
Externí odkaz:
http://arxiv.org/abs/cond-mat/0506200
The collective dynamics of liquid Gallium close to the melting point has been studied using Inelastic X-ray Scattering to probe lengthscales smaller than the size of the first coordination shell. %(momentum transfers, $Q$, $>$15 nm$^{-1}$). Although
Externí odkaz:
http://arxiv.org/abs/cond-mat/0503140
Autor:
Pontecorvo, E., Krisch, M., Cunsolo, A., Monaco, G., Mermet, A., Verbeni, R., Sette, F., Ruocco, G.
High-resolution, inelastic x-ray scattering measurements of the dynamic structure factor S(Q,\omega) of liquid water have been performed for wave vectors Q between 4 and 30 nm^-1 in distinctly different thermodynamic conditions (T= 263 - 420 K ; at,
Externí odkaz:
http://arxiv.org/abs/cond-mat/0501205
Publikováno v:
J. Chem. Phys. 121, 7533 (2004)
We report a numerical study of saddles properties of the potential energy landscape for soft spheres with different softness, i.e. different power n of the interparticle repulsive potential. We find that saddle-based quantities rescale into master cu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0409642
The influence of an applied shear field on the dynamics of an aging colloidal suspension has been investigated by the dynamic light scattering determination of the density autocorrelation function. Though a stationary state is never observed, the slo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406321
Publikováno v:
Phys.Rev. E70 (2004) 041101
We study the thermodynamics and the properties of the stationary points (saddles and minima) of the potential energy for a phi^4 mean field model. We compare the critical energy Vc (i.e. the potential energy V(T) evaluated at the phase transition tem
Externí odkaz:
http://arxiv.org/abs/cond-mat/0405188