Browsing Research Articles, Center for Stochastic Processes in Science and Engineering (CSPISE) by Title
Now showing items 120 of 22

Bistability in an Ising model with nonHamiltonian dynamics
(American Physical Society, 199203)We investigate the phenomenon of magnetization bistability in a twodimensional Ising model with a nonHamiltonian Glauber dynamics by means of Monte Carlo simulations. This effect has previously been observed in the Toom ... 
Bound states of hydrogen atom in a theory with minimal length uncertainty relations
(AIP Publishing, 200705)The following properties of bound states of hydrogen atom in a theory with noncommuting position operators are investigated: their number, multiplicities, accidental degeneracy, localization, and dependence on the values ... 
Coarsening of "clouds" and dynamic scaling in a farfromequilibrium model system
(American Physical Society, 200704)A twodimensional lattice gas of two species, driven in opposite directions by an external force, undergoes a jamming transition if the filling fraction is sufficiently high. Using Monte Carlo simulations, we investigate ... 
Driven diffusive systems: How steady states depend on dynamics
(American Physical Society, 200406)In contrast to equilibrium systems, nonequilibrium steady states depend explicitly on the underlying dynamics. Using Monte Carlo simulations with Metropolis, Glauber, and heat bath rates, we illustrate this expectation for ... 
Effects of gravity on equilibrium crystal shapes: Droplets hung on a wall
(American Physical Society, 198704)General properties of equilibrium crystal shapes pinned on a vertical wall and subject to gravity are sought. For twodimensional crystals, or threedimensional ones with axial symmetry held in suitable geometries, we are ... 
Effects of receptor clustering on ligand dissociation kinetics: Theory and simulations
(CELL PRESS, 20051201)Receptorligand binding is a critical first step in signal transduction and the duration of the interaction can impact signal generation. In mammalian cells, clustering of receptors may be facilitated by heterogeneous zones ... 
equilibrium budding and vesiculation in the curvature model of fluid lipid vesicles
(American Physical Society, 199106)According to a model introduced by Helfrich [Z. Naturforsch. 28c, 693 (1973)], the shape of a closed lipid vesicle is determined by minimization of the total bending energy at fixed surface area and enclosed volume. We ... 
Estimate Of The IncoherentScattering Contribution To Lidar Backscatter From Clouds
(Optical Society of America, 19990901)Lidar backscatter from clouds in the Delft University of Technology experiment is complicated by the fact that the transmitter has a narrow beam width, whereas the receiver has a much wider one. The issue here is whether ... 
Exact dynamics of a reactiondiffusion model with spatially alternating rates
(American Physical Society, 200505)We present the exact solution for the full dynamics of a nonequilibrium spin chain and its dual reactiondiffusion model, for arbitrary initial conditions. The spin chain is driven out of equilibrium by coupling alternating ... 
Fieldinduced vacancy localization in a driven lattice gas: Scaling of steady states
(American Physical Society, 200001)With the help of Monte Carlo simulations and a meanfield theory, we investigate the ordered steadystate structures resulting from the motion of a single vacancy on a periodic lattice which is filled with two species of ... 
finger formation in a driven diffusive system
(American Physical Society, 199105)A driven diffusive lattice gas is studied in a rectangular geometry: particles are fed in at one side and extracted at the other, after being swept through the system by a uniform driving field. Being periodic in the ... 
Inhomogeneous exclusion processes with extended objects: The effect of defect locations
(American Physical Society, 200711)We study the effects of local inhomogeneities, i.e., slow sites of hopping rate q < 1, in a totally asymmetric simple exclusion process for particles of size l >= 1 (in units of the lattice spacing). We compare the simulation ... 
New phase in the onedimensional tJ model
(American Physical Society, 199305)A new phase of a gas of pairs of electrons bounded in a singlet state is found in the onedimensional t J model for J > 2t and the density of electrons less than 0.2. This phase was conjectured in the study of the ... 
Position and length operators in a theory with minimal length
(AIP Publishing, 200705)Relations between the notions of fundamental and minimal lengths, and duality, in a system with minimal length uncertainty relations are examined. Selfadjoint versions of operators relevant to the problem, and their ... 
Roughness, spatial, and temporal correlations of an interface in a driven nonequilibrium lattice gas
(American Physical Society, 198905)The interface of a stochastic Ising lattice gas driven into a nonequilibrium steady state by a constant, uniform electric field E parallel to the interface is studied by extensive Monte Carlo simulation in two dimensions. ... 
Spincharge separation in the twodimensional Hubbard and tJ models at low electronic density
(American Physical Society, 199407)The spin and densitycorrelation functions of the twodimensional Hubbard model at low electronic density [n] are calculated in the ground state by using the power method, and at finite temperatures by using the quantum ... 
Stationary correlations for a farfromequilibrium spin chain
(American Physical Society, 200210)A kinetic onedimensional Ising model on a ring evolves according to a generalization of Glauber rates, such that spins at even (odd) lattice sites experience a temperature T(e) (T(o)). Detailed balance is violated so that ... 
Steady states of a nonequilibrium lattice gas
(American Physical Society, 200509)We present a Monte Carlo study of a lattice gas driven out of equilibrium by a local hopping bias. Sites can be empty or occupied by one of two types of particles, which are distinguished by their response to the hopping ... 
Strongly anisotropic roughness in surfaces driven by an oblique particle flux
(American Physical Society, 200605)Using field theoretic renormalization, an MBEtype growth process with an obliquely incident influx of atoms is examined. The projection of the beam on the substrate plane selects a "parallel" direction, with rotational ... 
tJ model studied by the power Lanczos method
(American Physical Society, 199503)The initial trial wave function used in a simple groundstate projection method, the power method, is systematically improved by using Lanczos algorithm. Much faster convergence to the ground state achieved by using these ...