The Lognormal Distribution and Quantum Monte Carlo DataQuantum Monte Carlo data are often afflicted with distributions that resemble lognormal probability distributions and consequently their statistical analysis can not be based on simple Gaussian…Mervlyn Moodley·Mar 27, 2003SaveLearn
Magnetic and thermal properties of 4f-3d ladder-type molecular compoundsWe report on the low-temperature magnetic susceptibilities and specific heats of the isostructural spin-ladder molecular complexes L2[M(opba)]3· xDMSO· yH2O, hereafter…M. Evangelisti, M. L. Kahn, J. Bartolome et al.·Mar 27, 2003SaveLearn
Magneto-Optics in parabolic three-dimensional quantum dots in magnetic fields of arbitrary directionWe generalize the Kohn's theorem to the case of parabolic three-dimensional quantum dots in magnetic fields of arbitrary direction. We show numerically that the exact resonance frequencies in the…Marti Pi, Francesco Ancilotto, Enrico Lipparini·Mar 27, 2003SaveLearn
Fingerprinting the Electronic Wavefunctions of Ultra-Small ConductorsBy extending the Orthodox theory of Coulomb blockade to include the nano-scale effects of environmental electric fields, we show that tunneling spectra of metallic nanoislands contain information not…Gustavo A. Narvaez, George Kirczenow·Mar 27, 2003SaveLearn
A far-from-equilibrium fluctuation-dissipation relation for an Ising-Glauber-like modelWe derive an exact expression of the response function to an infinitesimal magnetic field for an Ising-Glauber-like model with arbitrary exchange couplings. The result is expressed in terms of…Christophe Chatelain·Mar 26, 2003SaveLearn
Critical Casimir effect and wetting by helium mixturesWe have measured the contact angle of the interface of phase-separated 3He-4He mixtures against a sapphire window. We have found that this angle is finite and does not tend to zero when the…Sebastien Balibar, Tomohiro Ueno, Takao Mizusaki et al.·Mar 26, 2003SaveLearn
Density Matrix Renormalization: A Review of the Method and its ApplicationsThe Density Matrix Renormalization Group (DMRG) has become a powerful numerical method that can be applied to low-dimensional strongly correlated fermionic and bosonic systems. It allows for a very…Karen Hallberg·Mar 26, 2003SaveLearn
Electronic polarization in pentacene crystals and thin filmsElectronic polarization is evaluated in pentacene crystals and in thin films on a metallic substrate using a self-consistent method for computing charge redistribution in non-overlapping molecules.…E. V. Tsiper, Z. G. Soos·Mar 26, 2003SaveLearn
Nonrelativistic Green's function for systems with position-dependent massGiven a spatially dependent mass we obtain the two-point Green's function for exactly solvable nonrelativistic problems. This is accomplished by mapping the wave equation for these systems into…A. D. Alhaidari·Mar 25, 2003SaveLearn
Magnetically controlled ballistic deposition. A model of polydisperse granular packingThe flow and deposition of polydisperse granular materials is simulated through the Magnetic Diffusion Limited Aggregation (MDLA) model. The random walk undergone by an entity in the MDLA model is…K. Trojan, M. Ausloos·Mar 25, 2003SaveLearn
Bound states of 3He at the edge of a 4He drop on a cesium surfaceWe show that small amounts of 3He atoms, added to a 4He drop deposited on a flat cesium surface at zero temperature, populate bound states localized at the contact line. These edge states show up for…R. Mayol, M. Barranco, E. S. Hernandez et al.·Mar 24, 2003SaveLearn
From nonwetting to prewetting: the asymptotic behavior of 4He drops on alkali substratesWe investigate the spreading of 4He droplets on alkali surfaces at zero temperature, within the frame of Finite Range Density Functional theory. The equilibrium configurations of several 4HeN…M. Barranco, M. Guilleumas, E. S. Hernandez et al.·Mar 24, 2003SaveLearn
Irreversibility of Time for Quasi-Isolated SystemsA physical system is called quasi-isolated if it subject to small random uncontrollable perturbations. Such a system is, in general, stochastically unstable. Moreover, its phase-space volume at…V. I. Yukalov·Mar 24, 2003SaveLearn
Sandpile models and random walkers on finite latticesAbelian sandpile models, both deterministic, such as the Bak, Tang, Wiesenfeld (BTW) model [P. Bak, C. Tang and K. Wiesenfeld, Phys. Rev. Lett. 59, 381 (1987)], and stochastic, such as the…Yehiel Shilo, Ofer Biham·Mar 24, 2003SaveLearn
Numerical simulation of stochastic vortex tanglesWe present the results of simulation of the chaotic dynamics of quantized vortices in the bulk of superfluid He II. Evolution of vortex lines is calculated on the base of the Biot-Savart law. The…L. P. Kondaurova, S. K. Nemirovskii, M. V. Nedoboiko·Mar 24, 2003SaveLearn
Duality in process of noncommutative deformation and topological nature of integral Cherepanov-RiceIn this papers it is showed, that for the noncommutative deformation simultaneously exist also loading deformation H , and unloading deformation Hv . The real deformation is a combination of…Trinh Van Khoa·Mar 23, 2003SaveLearn
Dimensional and Temperature Crossover in Trapped Bose GasesWe investigate the long-range phase coherence of homogeneous and trapped Bose gases as a function of the geometry of the trap, the temperature, and the mean-field interactions in the weakly…U. Al Khawaja, N. P. Proukakis, J. O. Andersen et al.·Mar 22, 2003SaveLearn
Parametric Spectral Statistics in Unitary Random Matrix Ensembles: From Distribution Functions to Intra-Level CorrelationsWe establish a general framework to explore parametric statistics of individual energy levels in unitary random matrix ensembles. For a generic confinement potential W(H), we (i) find the joint…I. E. Smolyarenko, B. D. Simons·Mar 21, 2003SaveLearn
Self-stabilization of high frequency oscillations in semiconductor superlattices by time-delay autosynchronizationWe present a novel scheme to stabilize high-frequency domain oscillations in semiconductor superlattices by a time-delayed feedback loop. Applying concepts from chaos control theory we propose to…J. Schlesner, A. Amann, N. B. Janson et al.·Mar 21, 2003SaveLearn
Optimally squeezed spin statesWe consider optimally spin-squeezed states that maximize the sensitivity of the Ramsey spectroscopy, and for which the signal to noise ratio scales as the number of particles N. Using the…A. G. Rojo·Mar 20, 2003SaveLearn
Spin relaxation in n-doped gallium arsenide due to impurity and electron-electron Elliot-Yafet scatteringWe calculate the spin relaxation time of conduction electrons in n-doped bulk gallium arsenide. We consider the Elliot-Yafet spin-relaxation mechanism, driven by Coulombic-impurity and…P. I. Tamborenea, M. A. Kuroda, F. L. Bottesi·Mar 20, 2003SaveLearn
Dynamics of the 7 x 7 DAS-reconstructed Silicon (111) SurfaceWe studied the dynamics of the reconstructed Si (111) surface using a total-energy-vibrational-spectrum approach based on a non-orthogonal tight-binding Hamiltonian. We first established the size of…Lei Liu, C. S. Jayanthi, Shi-Yu Wu·Mar 20, 2003SaveLearn
Three-dimensional vortex configurations in a rotating Bose Einstein condensateWe consider a rotating Bose-Einstein condensate in a harmonic trap and investigate numerically the behavior of the wave function which solves the Gross Pitaevskii equation. Following recent…Amandine Aftalion, Ionut Danaila·Mar 20, 2003SaveLearn
On a dual model for 5f electronsWe study the effect of intra-atomic correlations on anisotropies of hopping of 5f electrons. It is shown that they may considerably enhance these anisotropies to the extend that electrons in some of…D. V. Efremov, N. Hasselmann, E. Runge et al.·Mar 20, 2003SaveLearn
Polariton condensation and lasing in optical microcavities - the decoherence driven crossoverWe explore the behaviour of a system which consists of a photon mode dipole coupled to a medium of two-level oscillators in a microcavity in the presence of decoherence. We consider two types of…M. H. Szymanska, P. B. Littlewood, B. D. Simons·Mar 19, 2003SaveLearn