Física de la Matèria Condensada: Envíos recientes
Mostrando ítems 81-100 de 1286
Chaotic dynamics of electric-field domains in periodically driven superlattices
Self-sustained time-dependent current oscillations under dc voltage bias have been observed in recent experiments on n-doped semiconductor superlattices with sequential resonant tunneling. The current oscillations are ...
Organic magnetoelectroluminescence for room temperature transduction between magnetic and optical information
Magnetic and spin-based technologies for data storage and processing provide unique challenges for information transduction to light because of magnetic metals' optical loss, and the inefficiency and resistivity of ...
Can extreme black Holes have (long) Abelian Higgs hair?
It has been argued that a black hole horizon can support the long-range fields of a Nielsen-Olesen string and that one can think of such a vortex as black hole "hair." In this paper, we examine the properties of an Abelian ...
Motility and morphodynamics of confined cells
We introduce a minimal hydrodynamic model of polarization, migration, and deformation of a biologicalcell confined between two parallel surfaces. In our model, the cell is driven out of equilibrium by an activecytsokeleton ...
Clogging transition of many-particle systems flowing through bottlenecks
When a large set of discrete bodies passes through a bottleneck, the flow may become intermittent due to the development of clogs that obstruct the constriction. Clogging is observed, for instance, in colloidal suspensions, ...
Force-Dependent Fragility in RNA Hairpins
We apply Kramers theory to investigate the dissociation of multiple bonds under mechanical force and interpret experimental results for the unfolding and refolding force distributions of an RNA hairpin pulled at different ...
Multicaloric materials and effects
Multicaloric materials show thermal changes that can be driven simultaneously or sequentially by more than one type of external field, and the resulting multicaloric effects can be large in multiferroic materials. The use ...
Spatiotemporal stochastic resonance in the Swift-Hohenberg equation
We show the appearance of spatiotemporal stochastic resonance in the Swift-Hohenberg equation. This phenomenon emerges when a control parameter varies periodically in time around the bifurcation point. By using general ...
Forecasting cosmic doomsday from CMB-LSS cross-correlations.
A broad class of dark energy models, which have been proposed in attempts at solving the cosmological constant problems, predict a late time variation of the equation of state with redshift. The variation occurs as a scalar ...
Insectes socials i relacions complexes
El congrés NetSci de Saragossa del passat juny de 2015 va tenir com a convidat especial l'arƟ sta Tomás Saraceno. Vaig tenir l'oportunitat de conèixer-lo en persona. Durant els darrers anys, Saraceno s'ha fet mundialment ...
Membranes with different hydration levels: the interface between bound and unbound hydration water
The interaction of water with membranes is fundamental in many biological processes. Recently we found that, upon increasing hydration, water molecules first fill completely the interior of the membrane, next accumulate ...
Recovery of Free Energy Branches in Single Molecule Experiments
We present a method for determining the free energy of coexisting states from irreversible work measurements. Our approach is based on a fluctuation relation that is valid for dissipative transformations in partially ...
Nonequilibrium phase transition in a model for the propagation of innovations among economic agents
We characterize the different morphological phases that occur in a simple one-dimensional model of propagation of innovations among economic agents [X. Guardiola et al., Phys. Rev E 66, 026121 (2002)]. We show that the ...
Optimization of laser interferometers for the detection of gravitational waves from coalescing binaries
Coalescing compact binary systems are important sources of gravitational waves. Here we investigate the detectability of this gravitational radiation by the recently proposed laser interferometers. The spectral density of ...
Glassiness in a model without energy barriers
We propose a microscopic model without energy barriers in order to explain some generic features observed in structural glasses. The statics can be exactly solved while the dynamics has been clarified using Monte Carlo ...
Exact solution to the exit-time problem for an undamped free particle driven by Gaussian white noise
In a recent paper [Phys. Rev. Lett. 75, 189 (1995)] we have presented the exact analytical expression for the mean exit time, T(x,v), of a free inertial process driven by Gaussian white noise out of a region (0,L) in space. ...
Asymmetric giant magnetoresistance in Co10Cu90 magnetic granular alloys
We have observed a type of giant magnetoresistance (GMR) in magnetic granular Co10Cu90 alloys. The asymmetric GMR depends strongly on the size of magnetic Co particles, which exhibit superparamagnetic behavior at given ...
Fragile-glass behavior of a short-range p-spin model
We propose a short-range generalization of the p-spin interaction spin-glass model. The model is well suited to test the idea that an entropy collapse is at the bottom line of the dynamical singularity encountered in ...
Comment on 'Violation of the Zeroth Law of Thermodynamics in Systems with Negative Specific Heat'
A Comment on the Letter by A. Ramírez-Hernández, H. Larralde, and F. Leyvraz, Phys. Rev. Lett. 100, 120601 (2008).
Collective dynamics and conformal ordering in electrophoretically driven nematic colloids
We present a theoretical framework to understand the collective dynamics of an ensemble of electrophoret-ically driven colloidal particles that are forced to assemble around a single topological defect in a nematicliquid ...
