Measurement of relative phase diffusion between two Bose-Einstein condensatesWe propose a method of measuring diffusion of the relative phase between two Bose-Einstein condensates occupying different nuclear or spin hyperfine states coupled by a two-photon transition via an…Janne Ruostekoski, Dan F. Walls·Jun 29, 1998SaveLearn
Nonlinear Josephson-type oscillations of a driven, two-component Bose-Einstein condensateWe propose an experiment that would demonstrate nonlinear Josephson-type oscillations in the relative population of a driven, two-component Bose-Einstein condensate. An initial state is prepared in…J. Williams, R. Walser, J. Cooper et al.·Jun 26, 1998SaveLearn
On Growth, Disorder, and Field TheoryThis article reviews recent developments in statistical field theory far from equilibrium. It focuses on the Kardar-Parisi-Zhang equation of stochastic surface growth and its mathematical relatives,…Michael Lassig·Jun 26, 1998SaveLearn
Effect of Landauer's blowtorch on the equilibration rate in a bistable potentialKinetic aspect of Landauer's blowtorch effect is investigated for a model double-well potential with localized heating. Using the supersymmetric approach, we derive an approximate analytical…Mulugeta Bekele, S. Rajesh, G. Ananthakrishna et al.·Jun 26, 1998SaveLearn
Quantum dynamics of evaporatively cooled Bose-Einstein CondensatesWe report on dynamical simulations of Bose-Einstein condensation via evaporative cooling in an atomic trap. The results show evidence for spontaneous vortex formation and quantum dynamics in small…P. D. Drummond, J. F. Corney·Jun 26, 1998SaveLearn
Effect of quantum group invariance on trapped Fermi gasesWe study the properties of a thermodynamic system having the symmetry of a quantum group and interacting with a harmonic potential. We calculate the dependence of the chemical potential, heat…Marcelo R. Ubriaco·Jun 26, 1998SaveLearn
Flow-Equations for the Model of Hybridized Bosons and FermionsUsing the flow-equations method we showed analytically the occurence of dispersion for the local bosons in a model of hybridized of local bosons and fermions.C. P. Moca, I. Tifrea, M. Crisan·Jun 26, 1998SaveLearn
Flow-Equation method for a superconductor with magnetic correlationsThe flow equation method has been used to calculate the energy of single impurity in a superconductor for the Anderson model with U ≠ 0. We showed that the energy of the impurity depends only of…C. P. Moca, M. Crisan, I. Tifrea·Jun 26, 1998SaveLearn
Quantum Hall effect anomaly and collective modes in the magnetic-field-induced spin-density-wave phases of quasi-one-dimensional conductorsWe study the collective modes in the magnetic-field-induced spin-density-wave (FISDW) phases experimentally observed in organic conductors of the Bechgaard salts family. In phases that exhibit a sign…N. Dupuis, Victor M. Yakovenko·Jun 25, 1998SaveLearn
Breakdown of the Universality Hypothesis in Directed Abelian Sandpile ModelsWe show that in a broad class of directed abelian sandpile models that had been expected to have the same exponents as the Dhar-Ramaswamy model, the avalanche exponent depends upon the details of the…Rick Tully, George Reiter·Jun 25, 1998SaveLearn
Edge Excitations of an Incompressible Fermionic Liquid in a Disorder Magnetic FieldThe model of lattice fermions in 2+1 dimensional space is formulated, the critical states of which are lying in the basis of such physical problems, as 3D Ising Model(3DIM) and the edge excitations…A. Sedrakyan·Jun 25, 1998SaveLearn
Magnetic excitation spectra of NaV2O5We present low temperature Raman spectra of NaV2O5 single crystal. The assignation of the observed modes is done on the basis of Monte Carlo calculation of excited states of Heisenberg dimerized…K. Ladavac, M. J. Konstantinovic, A. Belic et al.·Jun 25, 1998SaveLearn
Quantum Kinetic Theory of Condensate Growth---Comparison of Experiment and TheoryIn a major extension of our previous model (C.W. Gardiner, P. Zoller, R.J. Ballagh and M.J. Davis, Phys. Rev. Lett. 79, 1793 (1997)) of condensate growth, we take account of the evolution of the…C. W. Gardiner, M. D. Lee, R. J. Ballagh et al.·Jun 24, 1998SaveLearn
Quantum transport of composite fermions in narrow constrictionsWe elaborate on a single-mode description of the ballistic charge transport through a narrow constriction in a compressible (composite fermion) Quantum Hall liquid. In the presence of long-range…D. V. Khveshchenko·Jun 24, 1998SaveLearn
Stabilizing dynamical localization in driven tunnelingDynamical localization of a tunneling system by means of an oscillating external field is examined for an arbitrary doublet of tunneling states. We show that the condition of an exact crossing of…J. Stockburger, C. H. Mak·Jun 23, 1998SaveLearn
Ground-state energy of confined charged bosons in two dimensionsThe Pade approximant technique and the variational Monte Carlo method are applied to determine the ground-state energy of a finite number of charged bosons in two dimensions confined by a parabolic…A. Gonzalez, B. Partoens, A. Matulis et al.·Jun 22, 1998SaveLearn
Diagonal Ladders: A New Class of Models for Strongly Coupled Electron SystemsWe introduce a class of models defined on ladders with a diagonal structure generated by np plaquettes. The case np=1 corresponds to the necklace ladder and has remarkable properties which are…G. Sierra, M. A. Martin-Delgado, S. R. White et al.·Jun 21, 1998SaveLearn
Renormalization--Group Solutions for Yukawa PotentialThe self--similar renormalization group is used to obtain expressions for the spectrum of the Hamiltonian with the Yukawa potential. The critical screening parameter above which there are no bound…V. I. Yukalov, E. P. Yukalova, F. A. Oliveira·Jun 21, 1998SaveLearn
Magnetic quantum tunneling in the half-integer high spin molecule CrNi6: a muSR studyIn high spin molecules metal ions are coupled by ferro or antiferromagnetic short range interactions so that their magnetic moments are parallel or antiparallel to each other at temperatures (T) much…A. Keren, P. Mendels, A. Kratzer et al.·Jun 19, 1998SaveLearn
Spinodal decomposition of a binary mixture in an uniform shear flowResults are presented for the phase separation process of a binary mixture subject to an uniform shear flow quenched from a disordered to a homogeneous ordered phase. The kinetics of the process is…F. Corberi, G. Gonnella, A. Lamura·Jun 19, 1998SaveLearn
Beta Function Constraints from Renormalization Groups Flows in Spin SystemsInspired by previous work on the constraints that duality imposes on beta functions of spin models, we propose a consistency condition between those functions and RG flows at different points in…Joao D. Correia·Jun 19, 1998SaveLearn
Pseudogap in the one-electron spectral functions of the attractive Hubbard modelWe calculate the one-electron Green's function of the 2D attractive Hubbard model by coupling the electrons to pair fluctuations. The latter are approximated by homogeneous amplitude fluctuations…Massimiliano Capezzali, Hans Beck·Jun 18, 1998SaveLearn
Complex Formation Between Polyelectrolytes and Ionic SurfactantsThe interaction between polyelectrolyte and ionic surfactant is of great importance in different areas of chemistry and biology. In this paper we present a theory of polyelectrolyte ionic-surfactant…Paulo S. Kuhn, Yan Levin, Marcia C. Barbosa·Jun 18, 1998SaveLearn
Dynamics theory of deformable solids with quasiparticle excitations in the presence of electromagnetic fieldsA full selfconsistent set of equations is deduced to describe the kinetics and dynamics of charged quasiparticles (electrons, holes etc.) with arbitrary dispersion law in crystalline solids subjected…Dimitar I. Pushkarov·Jun 18, 1998SaveLearn
Charge ordering and opening of spin gap in NaV2O5We suggest that the phase transition observed in NaV2O5 at Tc = 34K is not a spin-Peierls transition, but a charge ordering transition, related to the formal presence in this system of equal…Maxim Mostovoy, Daniel Khomskii·Jun 18, 1998SaveLearn