Física de la Matèria Condensada: Recent submissions
Now showing items 161-180 of 1286
Self-similarity properties of natural images resemble those of turbulent flows
We show that the statistics of an edge type variable in natural images exhibits self-similarity properties which resemble those of local energy dissipation in turbulent flows. Our results show that self-similarity and ...
Critical clusters and efficient dynamics for frustrated spin models
A general method to find, in a systematic way, efficient Monte Carlo cluster dynamics among the avast class of dynamics introduced by Kandel et al. [Phys. Rev. Lett. 65, 941 (1990)] is proposed. The method is successfully ...
Noise and dynamics of self-organized critical phenomena
Different microscopic models exhibiting self-organized criticality are studied numerically and analytically. Numerical simulations are performed to compute critical exponents, mainly the dynamical exponent, and to check ...
Solid containing rotationally free nanocrystalline (Y-Fe2O3: Material for a nanosclae magnetic compass
A nanocomposite material has been characterized that contains nanometer size magnets that are free to rotate in response to an applied magnetic field. The composite consists of 5–10 nm crystals of γ-Fe2O3 dispersed in a ...
Long-range-interactions induced ordered structures in deposition processes
We present a new model of sequential adsorption in which the adsorbing particles experience dipolar interactions. We show that in the presence of these long-range interactions, highly ordered structures in the adsorbed ...
Continued fraction solution for the radiative transfer equation in three dimensions
Starting from the radiative transfer equation, we obtain an analytical solution for both the free propagator along one of the axes and an arbitrary phase function in the Fourier-Laplace domain. We also find the effective ...
Structural behavior and dynamics of an anomalous fluid between attractive and repulsive walls: Templating, molding, and superdiffusion
Confinement can modify the dynamics, the thermodynamics, and the structural properties of liquid water, the prototypical anomalous liquid. By considering a generic model for anomalous liquids, suitable for describing ...
Equilibrium and nonequilibrium thermodynamics of a photon gas in the near field
In this paper, we study the near-field thermodynamics of a photon gas at equilibrium as well as out-of-equilibrium in the presence of dissipative effects. As a consequence of Heisenberg's uncertainty principle, we are able ...
Pair production by and electric field in (1+1)-dimensional de Sitter space
We use the method of Bogolubov transformations to compute the rate of pair production by an electric field in (1+1)-dimensional de Sitter space. The results are in agreement with those obtained previously using the instanton ...
Thermostatistical description of small systems in nonequilibrium conditions: Energy conversion and harvesting
Hysteresis cycles are very important features of energy conversion and harvesting devices, such as batteries. The efficiency of these may be strongly affected by the physical size of the system. Here, we show that in systems ...
A dynamical model describing stock market price distributions
High-frequency data in finance have led to a deeper understanding on probability distributions of market prices. Several facts seem to be well established by empirical evidence. Specifically, probability distributions have ...
Black holes in higher dimensions
We review black-hole solutions of higher-dimensional vacuum gravity and higher-dimensional supergravity theories. The discussion of vacuum gravity is pedagogical, with detailed reviews of Myers<br>Perry solutions, black ...
Social Interactions Lead to Motility-Induced Phase Separation in Fire Ants
Collections of fire ants are a form of active matter, as the ants use their internal metabolism to self-propel. In the absence of aligning interactions, theory and simulations predict that active matter with spatially ...
Bubble fluctuations in Omega less than 1 inflation
In the context of the open inflationary universe, we calculate the amplitude of quantum fluctuations which deform the bubble shape. These give rise to scalar field fluctuations in the open Friedmann-Robertson-Walker universe ...
Entropic Electrokinetics: Recirculation, Particle Separation, and Negative Mobility
We show that when particles are suspended in an electrolyte confined between corrugated charged surfaces, electrokinetic flows lead to a new set of phenomena such as particle separation, mixing for low-Reynolds micro- and ...
Clustering of random scale-free networks
We derive the finite-size dependence of the clustering coefficient of scale-free random graphs generated by the configuration model with degree distribution exponent 2<γ<3. Degree heterogeneity increases the presence of ...
Magnetic properties and giant magnetoresistance in melt-spun CoCu alloys
Magnetic, structural, and transport properties of as quenched and annealed Co10Cu90 samples have been investigated using x¿ray diffraction and a SQUID magnetometer. The largest value of MR change was observed for the ...
Colloquium: Ice rule and emergent frustration in particle ice and beyond
Geometric frustration and the ice rule are two concepts that are intimately connected and widespread across condensed matter. The first refers to the inability of a system to satisfy competing interactions in the presence ...
Spectral properties of the Laplacian of multiplex networks.
One of the more challenging tasks in the understanding of dynamical properties of models on top of complex networks is to capture the precise role of multiplex topologies. In a recent paper, Gómez et al. [ Phys. Rev. Lett. ...
Magnetic relaxation of a one-dimensional model for small particle systems with dipolar interactions: Monte Carlo simulation
Atribution as a function of the time are analyzed and this study leads to a deeper knowledge of the microscopic processes involved in the magnetic relaxation
