Lattice Boltzmann simulations of segregating binary fluid mixtures in shear flowWe apply lattice Boltzmann method to study the phase separation of a two-dimensional binary fluid mixture in shear flow. The algorithm can simulate systems described by the Navier-Stokes and…A. Lamura, G. Gonnella·May 30, 2000SaveLearn
Adiabatic compression of a trapped Fermi gasWe propose a method to reach conditions of high degeneracy in a trapped Fermi gas, based on the adiabatic transfer of atoms from a magnetic to a tighter optical trap. The transformation yields a…L. Viverit, S. Giorgini, L. P. Pitaevskii et al.·May 30, 2000SaveLearn
Force-distance studies with piezoelectric tuning forks below 4.2 KPiezoelectric quartz tuning forks have been employed as the force sensor in a dynamic mode scanning force microscope operating at temperatures down to 1.7 K at He-gas pressures of typically 5 mbar.…J. Rychen, T. Ihn, P. Studerus et al.·May 30, 2000SaveLearn
A real-space, rela-time method for the dielectric functionWe present an algorithm to calculate the linear response of periodic systems in the time-dependent density functional thoery, using a real-space representation of the electron wave functions and…G. F. Bertsch, J. -I. Iwata, Angel Rubio et al.·May 30, 2000SaveLearn
Rapidly Rotating Fermi GasesWe show that the density profile of a Fermi gas in rapidly rotating potential will develop prominent features reflecting the underlying Landau level like energy spectrum. Depending on the aspect…Tin-Lun Ho, C. V. Ciobanu·May 29, 2000SaveLearn
Remarks on Shannon's Statistical Inference and the Second Law in Quantum Statistical MechanicsWe comment on a formulation of quantum statistical mechanics, which incorporates the statistical inference of Shannon. Our basic idea is to distinguish the dynamical entropy of von Neumann, $H = -k…Kazuo Fujikawa·May 29, 2000SaveLearn
Shear response of a frictional interface to a normal load modulationWe study the shear response of a sliding multicontact interface submitted to a harmonically modulated normal load, without loss of contact. We measure, at low velocities (V<100 μm.s-1), the…L. Bureau, T. Baumberger, C. Caroli·May 29, 2000SaveLearn
Spin-orbit and exchange interaction in surface quantum wells on gapless semimagnetic semiconductor HgMnTeThe first study of two-dimensional electron gas in surface layers on HgMnTe with inverted bands is carried out experimentally and theoretically. It is shown that the structure of investigated…V. F. Radantsev, A. M. Yafyasov, V. B. Bogevolnov et al.·May 29, 2000SaveLearn
Dynamically Induced Multi-Channel Kondo EffectWe study how the multi-channel Kondo effect is dynamically induced to affect the photoemission and the inverse photoemission spectrum when an electron is emitted from (or added to) the completely…T. Fujii, N. Kawakami·May 29, 2000SaveLearn
Rotational spectra of weakly interacting Bose-Einstein condensatesWe study the spectrum of rotating Bose-Einstein Condensates in the limit of weak repulsive interactions and present analytical and numerical results for energies and wave functions. While the…Thomas Papenbrock, George F. Bertsch·May 26, 2000SaveLearn
Variational wave functions of a vortex in cyclotron motionIn two dimensions the microscopic theory, which provides a basis for the naive analogy between a quantized vortex in a superfluid and an electron in an uniform magnetic field, is presented. A…Jian-Ming Tang·May 26, 2000SaveLearn
Instabilities and self-socillations in atomic four-wave mixingThe development of integrated, waveguide-based atom optical devices requires a thorough understanding of nonlinear matter-wave mixing processes in confined geometries. This paper analyzes the…J. Heurich, H. Pu, M. G. Moore et al.·May 26, 2000SaveLearn
Soliton dynamics in 1D quantum antiferromagnetsThe problem of dissipative motion of solitons in the case of tetramethyl ammonium manganese chloride (TMMC) is studied as a function of the external magnetic field and the temperature. Two specific…A. Villares Ferrer, A. O. Caldeira, A. S. T. Pires·May 26, 2000SaveLearn
Pin-Hole Water Flow from Cylindrical BottlesWe performed an experiment on elementary hydrodynamics. The basic system is a cylindrical bottle from which water flows through a pin-hole located at the bottom of its lateral surface. We measured…P. M. C. de Oliveira, A. Delfino, E. V. Costa et al.·May 24, 2000SaveLearn
Dynamical Linked Cluster Expansions for Spin GlassesDynamical linked cluster expansions are linked cluster expansions with hopping parameter terms endowed with their own dynamics. This amounts to a generalization from 2-point to point-link-point…H. Meyer-Ortmanns, T. Reisz·May 24, 2000SaveLearn
Two-component model of a spin-polarized transportEffect of the spin-involved interaction of electrons with impurity atoms or defects to the transport properties of a two-dimensional electron gas is described by using a simplifying two-component…P. Seba, P. Exner, K. N. Pichugin et al.·May 24, 2000SaveLearn
A multifractal random walkWe introduce a class of multifractal processes, referred to as Multifractal Random Walks (MRWs). To our knowledge, it is the first multifractal processes with continuous dilation invariance…E. Bacry, J. Delour, J. F. Muzy·May 24, 2000SaveLearn
Evolution of the Spin Gap Upon Doping a 2-Leg LadderThe evolution of the spin gap of a 2-leg ladder upon doping depends upon the nature of the lowest triplet excitations in a ladder with two holes. Here we study this evolution using various numerical…D. Poilblanc, O. Chiappa, J. Riera et al.·May 24, 2000SaveLearn
Modelling fluctuations of financial time series: from cascade process to stochastic volatility modelIn this paper, we provide a simple, ``generic'' interpretation of multifractal scaling laws and multiplicative cascade process paradigms in terms of volatility correlations. We show that in…J. F. Muzy, J. Delour, E. Bacry·May 24, 2000SaveLearn
Braggoriton--Excitation in Photonic Crystal Infiltrated with Polarizable MediumLight propagation in a photonic crystal infiltrated with polarizable molecules is considered. We demonstrate that the interplay between the spatial dispersion caused by Bragg diffraction and…A. Yu. Sivachenko, M. E. Raikh, Z. V. Vardeny·May 24, 2000SaveLearn
Experimental Evidence for Electron Channelling in Fe/Au (100) MultilayersWe present transport and structural data from epitaxial (100) and (111) Au/Fe multilayers grown by molecular beam epitaxy. From their analysis, we conclude that an electron channelling mechanism, due…D. T. Dekadjevi, P. A. Ryan, B. J. Hickey et al.·May 23, 2000SaveLearn
Brownian Motion on a Sphere: Distribution of Solid AnglesWe study the diffusion of Brownian particles on the surface of a sphere and compute the distribution of solid angles enclosed by the diffusing particles. This function describes the distribution of…M. M. G. Krishna, Joseph Samuel, Supurna Sinha·May 22, 2000SaveLearn
Microscopic models of traveling wave equationsReaction-diffusion problems are often described at a macroscopic scale by partial derivative equations of the type of the Fisher or Kolmogorov-Petrovsky-Piscounov equation. These equations have a…Eric Brunet, Bernard Derrida·May 22, 2000SaveLearn
Shift in the velocity of a front due to a cut-offWe consider the effect of a small cut-off epsilon on the velocity of a traveling wave in one dimension. Simulations done over more than ten orders of magnitude as well as a simple theoretical…Eric Brunet, Bernard Derrida·May 22, 2000SaveLearn
Dynamic splitting of a Bose-Einstein CondensateWe study the dynamic process of splitting a condensate by raising a potential barrier in the center of a harmonic trap. We use a two-mode model to describe the phase coherence between the two halves…C. Menotti, J. R. Anglin, J. I. Cirac et al.·May 18, 2000SaveLearn