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- Sapienza University of RomeIT416 papers
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47 papers · 1 filter
Transverse power flow reversing of confined waves in extreme nonlinear metamaterials
A. Ciattoni, C. Rizza, E. Palange
We theoretically prove that electromagnetic beams propagating through a nonlinear cubic metamaterial can exhibit a power flow whose direction reverses its sign along the transverse…
Nonlocal potentials and complex angular momentum theory
J. Bros, E. De Micheli, G. A. Viano
The purpose of this paper is to establish meromorphy properties of the partial scattering amplitude T(lambda,k) associated with physically relevant classes N_{w,alpha}^gamma of non…
Interplay between charge-order, ferroelectricity and ferroelasticity: tungsten bronze structures as a playground for multiferroicity
Kunihiko Yamauchi, Silvia Picozzi
Large electron-electron Coulomb-interactions in correlated systems can lead to a periodic arrangement of localized electrons, the so called "charge-order". The latter is here propo…
Scale-free correlations in bird flocks
Andrea Cavagna, Alessio Cimarelli, Irene Giardina +4
From bird flocks to fish schools, animal groups often seem to react to environmental perturbations as if of one mind. Most studies in collective animal behaviour have aimed to unde…
Nonequilibrium dynamics of a stochastic model of anomalous heat transport: numerical analysis
L. Delfini, S. Lepri, R. Livi +2
We study heat transport in a chain of harmonic oscillators with random elastic collisions between nearest-neighbours. The equations of motion of the covariance matrix are numerical…
Nonequilibrium dynamics of a stochastic model of anomalous heat transport
S. Lepri, C. Mejia-Monasterio, A. Politi
We study the dynamics of covariances in a chain of harmonic oscillators with conservative noise in contact with two stochastic Langevin heat baths. The noise amounts to random coll…