Condensation energy in phonon and spin mediated superconductors - strong coupling approachWe consider the condensation energy, Ec of strongly coupled, magnetically-mediated superconductors within the context of the spin fermion model. We argue that although experimentally obtained…Robert Haslinger, Andrey Chubukov·Mar 7, 2003SaveLearn
Can one make a powder forget its history?It is shown that computer simulations can qualitatively reproduce experiments, where a powder of cohesive, round, hard particles is periodically deformed at constant volume. Two types of initial…M. Morgeneyer, L. Brendel, Z. Farkas et al.·Mar 7, 2003SaveLearn
Macroscopic and Microscopic Investigation on the History Dependence of the Mechanical Behaviour of PowdersAs an example for history dependent mechanical behaviour of cohesive powders experiments and computer simulations of uniaxial consolidation are compared. Some samples were precompacted transversally…D. Kadau, L. Brendel, G. Bartels et al.·Mar 7, 2003SaveLearn
Corridors of barchan dunes: stability and size selectionBarchans are crescentic dunes propagating on a solid ground. They form dune fields in the shape of elongated corridors in which the size and spacing between dunes are rather well selected. We show…P. Hersen, K. H. Andersen, H. Elbelrhiti et al.·Mar 6, 2003SaveLearn
Dissipative flow and vortex shedding in the Painlevé boundary layer of a Bose Einstein condensateRaman et al. have found experimental evidence for a critical velocity under which there is no dissipation when a detuned laser beam is moved in a Bose-Einstein condensate. We analyze the origin of…Amandine Aftalion, Qiang Du, Yves Pomeau·Mar 6, 2003SaveLearn
Anisotropy and Ising-like transition of the S=5/2 two-dimensional Heisenberg antiferromagnet Mn-formate di-UreaRecently reported measurements of specific heat on the compound Mn-formate di-Urea (Mn-f-2U) by Takeda et al. [Phys. Rev. B 63, 024425 (2001)] are considered. As a model to describe the overall…Alessandro Cuccoli, Tommaso Roscilde, Valerio Tognetti et al.·Mar 6, 2003SaveLearn
Nonextensivity of the cyclic Lattice Lotka Volterra modelWe numerically show that the Lattice Lotka-Volterra model, when realized on a square lattice support, gives rise to a finite production, per unit time, of the nonextensive entropy $Sq=…G. A. Tsekouras, A. Provata, C. Tsallis·Mar 6, 2003SaveLearn
Spot foreign exchange market and time seriesWe investigate high frequency price dynamics in foreign exchange market using data from Reuters information system (the dataset has been provided to us by Ols en & Associates). In our analysis we…Filippo Petroni, Maurizio Serva·Mar 4, 2003SaveLearn
Spin-sensitive Bleaching and Spin-Relaxation in QW'sSpin-sensitive saturation of absorption of infrared radiation has been investigated in p-type GaAs QWs. It is shown that the absorption saturation of circularly polarized radiation is mostly…Petra Schneider, S. D. Ganichev, J. Kainz et al.·Mar 4, 2003SaveLearn
Resonant inversion of the circular photogalvanic effect in n-doped quantum wellsWe show that the sign of the circular photogalvanic effect can be changed by tuning the radiation frequency of circularly polarized light. Here resonant inversion of the photogalvanic effect has been…S. D. Ganichev, V. V. Bel'kov, Petra Schneider et al.·Mar 4, 2003SaveLearn
The Structure of the [ZnIn - VP] Defect Complex in Zn Doped InPWe study the structure, the formation and binding energies and the transfer levels of the zinc-phosphorus vacancy complex [ZnIn - VP] in Zn doped p-type InP, as a function of the charge, using…C. W. M. Castleton, S. Mirbt·Mar 3, 2003SaveLearn
Polaron Energy Spectrum in Quantum DotsEnergy spectrum of a weak coupling polaron is considered in a cylindrical quantum dot. An analytical expression for the polaron energy shift is obtained using a modified pertubation theory.O. Z. Alekperov, N. M. Guseinov·Mar 3, 2003SaveLearn
Temperature Dependence of Microwave Loss, Electronic Transport and Magnetic Parameters in Polycrystalline Perovskite Manganites - Evidence that the Magnetic and the Metal-Insulator Transitions are not IdenticalMeasurements of the variation with temperature of the dc resistivity, ac susceptibility, dc magnetization and microwave loss for several systems of pseudo-cubic manganites reveal that the…S. I. Patil, S. M. Bhagat, Kristy Enckson et al.·Mar 1, 2003SaveLearn
Classical and Quantum Mechanics of AnyonsWe review aspects of classical and quantum mechanics of many anyons confined in an oscillator potential. The quantum mechanics of many anyons is complicated due to the occurrence of multivalued…G. Date, M. V. N. Murthy, Radhika Vathsan·Mar 1, 2003SaveLearn
Crack fronts and damage in glass at the nanometer scaleWe have studied the low speed fracture regime for different glassy materials with variable but controlled length scales of heterogeneity in a carefully mastered surrounding atmosphere. By using…C. Marliere, S. Prades, F. Celarie et al.·Feb 28, 2003SaveLearn
A new approach to dynamic finite-size scalingIn this work we have considered the Taylor series expansion of the dynamic scaling relation of the magnetization with respect to small initial magnetization values in order to study the dynamic…Mehmet Dilaver, Semra Gündüç, Meral Aydın et al.·Feb 27, 2003SaveLearn
Non-destructive, dynamic detectors for Bose-Einstein condensatesWe propose and analyze a series of non-destructive, dynamic detectors for Bose-Einstein condensates based on photo-detectors operating at the shot noise limit. These detectors are compatible with…J. E. Lye, J. J. Hope, J. D. Close·Feb 27, 2003SaveLearn
The noncommutative replica procedureThe alternative to the replica procedure, which we call the noncommutative replica procedure, is discussed. The detailed comparison with the standard replica procedure is performed.S. V. Kozyrev·Feb 27, 2003SaveLearn
Fluctuation conductivity in layered d-wave superconductors near critical disorderWe consider the fluctuation conductivity in the critical region of a disorder induced quantum phase transition in layered d-wave superconductors. We specifically address the fluctuation contribution…I. Tifrea, D. Bodea, I. Grosu et al.·Feb 26, 2003SaveLearn
Focusing of electromagnetic waves by periodic arrays of dielectric cylindersBy numerical simulations, we show that properly arranged two dimensional periodic arrays, formed by dielectric cylinders embedded in parallel in a uniform medium, can indeed act as an optical lens to…Bikash C. Gupta, Zhen Ye·Feb 26, 2003SaveLearn
Feedback cooling of a nanomechanical resonatorCooled, low-loss nanomechanical resonators offer the prospect of directly observing the quantum dynamics of mesoscopic systems. However, the present state of the art requires cooling down to the…Asa Hopkins, Kurt Jacobs, Salman Habib et al.·Feb 26, 2003SaveLearn
Resource Letter BEC-1: Bose-Einstein Condensates in Trapped Dilute GasesThis Resource Letter provides a guide to the literature on Bose-Einstein condensation in trapped dilute gases. Journal articles and books are cited for the following topics: history, technological…David S. Hall·Feb 25, 2003SaveLearn
Effective dimensions and percolation in hierarchically structured scale-free networksWe introduce appropriate definitions of dimensions in order to characterize the fractal properties of complex networks. We compute these dimensions in a hierarchically structured network of…Victor M. Eguiluz, Emilio Hernandez-Garcia, Oreste Piro et al.·Feb 25, 2003SaveLearn
Stochastic Simulation of Gene Expression in a Single CellIn this paper, we consider two stochastic models of gene expression in prokaryotic cells. In the first model, sixteen biochemical reactions involved in transcription, translation and transcriptional…Indrani Bose, Rajesh Karmakar, Siddhartha Roy·Feb 25, 2003SaveLearn
Quantitative Nanofriction Characterization of Corrugated Surfaces by Atomic Force MicroscopyAtomic Force Microscopy (AFM) is a suitable tool to perform tribological characterization of materials down to the nanometer scale. An important aspect in nanofriction measurements of corrugated…A. Podesta', G. Fantoni, P. Milani·Feb 24, 2003SaveLearn