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Mar 14, 2012

Cosmological models with interacting components and mass-varying ne…

A model for a homogeneous and isotropic spatially flat Universe, composed of baryons, radiation, neutrinos, dark matter and dark energy is analyzed. …
Apr 03, 2007

Dark energy interacting with neutrinos and dark matter: a phenomeno…

A model for a flat homogeneous and isotropic Universe composed of dark energy, dark matter, neutrinos, radiation and baryons is analyzed. The fields …
Nov 13, 2014

Non-minimally coupled tachyon field with Noether symmetry under the …

A model for a homogeneous, isotropic, flat Universe composed by dark energy and matter is investigated. Dark energy is considered to behave as a tach…
Dec 14, 2012
Statistical Mechanics

Exploiting a semi-analytic approach to study first order phase tran…

In a previous contribution, Phys. Rev. Lett 107, 230601 (2011), we have proposed a method to treat first order phase transitions at low temperatures.…
Jun 07, 2010
Statistical Mechanics
Soft Condensed Matter

Diffusion anomaly and dynamic transitions in the Bell-Lavis water mod…

In this paper we investigate the dynamic properties of the minimal Bell-Lavis (BL) water model and their relation to the thermodynamic anomalies. The…
Jul 10, 2009
Statistical Mechanics
Soft Condensed Matter

Liquid polymorphism, order-disorder transitions and anomalous behavio…

The Bell-Lavis model for liquid water is investigated through numerical simulations. The lattice-gas model on a triangular lattice presents orientati…
Jul 24, 2009
Chaotic Dynamics
Classical Physic

Footprints of sticky motion in the phase space of higher dimensional …

"Sticky" motion in mixed phase space of conservative systems is difficult to detect and to characterize, in particular for high dimensional phase spa…
Nov 17, 2007

Cosmological model with interactions in the dark sector

A cosmological model is proposed for the current Universe consisted of non-interacting baryonic matter and interacting dark components. The dark ener…
Jan 20, 2016

The van der Waals fluid and its role in cosmology

We analyze the properties of a generic cosmological fluid described by the van der Waals equation of state. Exact solutions for the energy density ev…
Jan 29, 2018
Soft Condensed Matter
Statistical Mechanics
Fluid Dynamics

Impact of roughness on the instability of a free-cooling granular gas

A linear stability analysis of the hydrodynamic equations with respect to the homogeneous cooling state is carried out to identify the conditions for…
Dec 19, 2018

Temperature oscillations of a gas moving close to circular geodesic i…

The objective of this work is to analyze the temperature oscillations that occur in a gas in a circular motion under the action of a Reissner-Nordstr…
May 04, 2015

Chaplygin Gas of Tachyon Nature Imposed by Symmetry and Constrained v…

An action of general form is proposed for a Universe containing matter, radiation and dark energy. The latter is interpreted as a tachyon field non-m…
Sep 15, 2011
Chaotic Dynamics

Bursting synchronization in networks with long-range coupling mediate…

Many networks of physical and biological interest are characterized by a long-range coupling mediated by a chemical which diffuses through a medium i…
Aug 15, 2017
Chaotic Dynamics

Proliferation of stability in phase and parameter spaces of nonlinear…

In this work we show how the composition of maps allows us to multiply, enlarge and move stable domains in phase and parameter spaces of discrete non…
Oct 11, 2018
Computational Physics
Fluid Dynamics

Lattice Boltzmann approach to rarefied gas flows using half-range G…

In this paper, we employ the lattice Boltzmann method to solve the Boltzmann equation with the Shakhov model for the collision integral in the contex…
Mar 20, 2019
Chaotic Dynamics

Intermittent stickiness synchronization

This work uses the statistical properties of Finite-Time Lyapunov Exponents (FTLEs) to investigate the Intermittent Stickiness Synchronization (ISS) …
Jan 17, 2012
Chaotic Dynamics

Effective transport barriers in nontwist systems

In fluids and plasmas with zonal flow reversed shear, a peculiar kind of transport barrier appears in the shearless region, one that is associated wi…
Oct 29, 2009
Soft Condensed Matter
Statistical Mechanics

Energy production rates in fluid mixtures of inelastic rough hard s…

The aim of this work is to explore the combined effect of polydispersity and roughness on the partial energy production rates and on the total coolin…
Sep 11, 2008

Tachyonization of the $\La$CDM cosmological model

In this work a tachyonization of the $\Lambda$CDM model for a spatially flat Friedmann-Robertson-Walker space-time is proposed. A tachyon field and a…
Sep 30, 2010
Soft Condensed Matter
Statistical Mechanics
Fluid Dynamics

Sonine approximation for collisional moments of granular gases of i…

We consider a dilute granular gas of hard spheres colliding inelastically with coefficients of normal and tangential restitution $\alpha$ and $\beta$…
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