Zobrazeno 1 - 10
of 4 903
pro vyhledávání: '"Ruffo, S."'
Publikováno v:
Commun. Nonlinear Sci. Numer. Simul. 60, 115 (2018)
We study the dynamics of Fermi-Pasta-Ulam chains with both harmonic and anharmonic power-law long-range interactions. We show that the dynamics is described in the continuum limit by a generalized fractional Boussinesq differential equation, whose de
Externí odkaz:
http://arxiv.org/abs/1802.00247
Publikováno v:
Phys. Rev. E 96, 062103 (2017)
We study inequivalence of canonical and microcanonical ensembles in the mean-field Blume-Emery-Griffiths model. This generalizes previous results obtained for the Blume-Capel model. The phase diagram strongly depends on the value of the biquadratic e
Externí odkaz:
http://arxiv.org/abs/1708.01082
Publikováno v:
European Physical Journal - Special Topics, EDP Sciences: EPJ, 2007, 147, pp.3
We present a detailed analysis of the modulational instability of the zone-boundary mode for one and higher-dimensional Fermi--Pasta--Ulam (FPU) lattices. The growth of the instability is followed by a process of relaxation to equipartition, which we
Externí odkaz:
http://arxiv.org/abs/1504.01490
Understanding the relaxation of a system towards equilibrium is a longstanding problem in statistical mechanics. Here we address the role of long-range interactions in this process by considering a class of two-dimensional or geophysical flows where
Externí odkaz:
http://arxiv.org/abs/1503.07904
Publikováno v:
Europhysics Letters 104, 17011 (2013)
We have studied needle shaped three-dimensional classical spin systems with purely dipolar interactions in the microcanonical ensemble, using both numerical simulations and analytical approximations. We have observed spontaneous magnetization for dif
Externí odkaz:
http://arxiv.org/abs/1305.5331
Publikováno v:
Phys. Rev. Lett. 111, 117202 (2013)
In a coupled ferroelectric/ferromagnetic system, i.e. a composite multiferroic, the propagation of magnetic or ferroelectric excitations across the whole structure is a key issue for applications. Of a special interest is the dynamics of localized ma
Externí odkaz:
http://arxiv.org/abs/1301.3802
Autor:
Defenu N; Institute for Theoretical Physics, ETH Zürich, Wolfgang-Pauli-Strasse 27, 8093 Zürich, Switzerland., Mukamel D; Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 7610001, Israel., Ruffo S; SISSA and INFN Sezione di Trieste, Via Bonomea 265, I-34136 Trieste, Italy and Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy.
Publikováno v:
Physical review letters [Phys Rev Lett] 2024 Aug 02; Vol. 133 (5), pp. 050403.
Publikováno v:
J. Stat. Mech. (2011) P03022
The Vlasov equation is well known to provide a good description of the dynamics of mean-field systems in the $N \to \infty$ limit. This equation has an infinity of stationary states and the case of {\it homogeneous} states, for which the single-parti
Externí odkaz:
http://arxiv.org/abs/1010.4647