Non-equilibrium Monte Carlo dynamics of the Sherrington-Kirkpatrick mean field spin glass modelWe present a numerical study of the non-equilibrium dynamics of the Sherrington-Kirkpatrick model. We analize the overlap distribution between the configurations visited at the time t and in…Andrea Baldassarri·Jul 23, 1996SaveLearn
Twist Boundary Conditions of Quantum Spin Chains near the Gaussian Fixed PointsDuality transformation, which relates a high-temperature phase to a low-temperature one, is used exactly to determine the critical point for several models (2D Ising, Potts, Ashkin-Teller, 8-vertex),…A. Kitazawa·Jul 23, 1996SaveLearn
The effect of electron-electron interactions on the average polarizability of a mesoscopic systemA comparison between an analytical calculation of the polarizability of a mesoscopic interacting system in the random phase approximation and numerical exact diagonalization results is presented.…Richard Berkovits·Jul 23, 1996SaveLearn
Fluctuations and defect-defect correlations in the ordering kinetics of the O(2) modelThe theory of phase ordering kinetics for the O(2) model using the gaussian auxiliary field approach is reexamined from two points of view. The effects of fluctuations about the ordering field are…Gene F. Mazenko, Robert A. Wickham·Jul 22, 1996SaveLearn
Current distributions and the de Haas-van Alphen oscillation in a planar system of Hall electronsThe current distribution is studied for a finite-width two-dimensional system of Hall electrons, with a clear distinction drawn between the equilibrium edge current and the Hall current. It is…K. Shizuya·Jul 22, 1996SaveLearn
Study of composite fermions: Beyond few particle systemsWe construct a new representation of composite fermion wave functions in the lowest Landau level which enables Monte Carlo computations at arbitrary filling factors for a fairly large number of…J. K. Jain, R. K. Kamilla·Jul 22, 1996SaveLearn
The ν=1/2 Quantum Hall Effect and Symmetry Properties of Two-Component Paired Quantum Hall StatesWe describe paired quantum Hall states at filling fractions ν, where ν-1 is an integer, and present explicit wavefunctions for these states. Experiments are proposed to distinguish between…A. M. Tikofsky·Jul 22, 1996SaveLearn
Event-based relaxation of continuous disordered systemsA computational approach is presented to obtain energy-minimized structures in glassy materials. This approach, the activation-relaxation technique (ART), achieves its efficiency by focusing on…G. T. Barkema, Normand Mousseau·Jul 22, 1996SaveLearn
Reflection Symmetric Ballistic Microstructures: Quantum Transport PropertiesWe show that reflection symmetry has a strong influence on quantum transport properties. Using a random S-matrix theory approach, we derive the weak-localization correction, the magnitude of the…Harold U. Baranger, Pier A. Mello·Jul 22, 1996SaveLearn
The annealed positions of ferromagnetic bonds doped into a 2D antiferromagnetWe determine where a given concentration of ferromagnetic (FM) bonds doped into a square lattice antiferromagnet must go to minimize the system's total magnetic energy. We find (i) an infinite…N. M. Salem, R. J. Gooding·Jul 22, 1996SaveLearn
Composite Fermion Hall Conductance at ν=1/2We show that in the limit of vanishing bare electron effective mass, and in the presence of particle-hole symmetric disorder (which can be of vanishing strength), the composite fermion Hall…D-H Lee, Y. Krotov, J. Gan et al.·Jul 22, 1996SaveLearn
Microscopic Oscillations in the Quantum Nucleation of Vortices Subject to Periodic Pinning Potential in a Thin SuperconductorWe present a theory for the decay of a supercurrent through nucleation of vortex-antivortex pairs in a two-dimensional superconductor in the presence of dissipation and of a periodic pinning…Roberto Iengo, Giancarlo Jug·Jul 22, 1996SaveLearn
Microcanonical Thermodynamics of First Order Phase Transitions studied in the Potts ModelPhase transitions of first and second order can easily be distinguished in small systems in the microcanonical ensemble. Configurations of phase coexistence, which are suppressed in the canonical…D. H. E. Gross, A. Ecker, X. Z. Zhang·Jul 22, 1996SaveLearn
DC--Transport in Quantum WiresThe influence of electron--electron interaction on two terminal DC conductance of one--dimensional quantum wires is studied. A cancelation between the effect of the electron--electron interaction on…Yuval Oreg, Alexander M. Finkel'stein·Jul 22, 1996SaveLearn
Bosons, gauge fields, and high-Tc cupratesA simple model of a degenerate two-dimensional Bose liquid interacting with a fluctuating gauge field is investigated as a possible candidate to describe the charge degree of freedom in the normal…Don H. Kim, Derek K. K. Lee, Patrick A. Lee·Jul 21, 1996SaveLearn
Electron Scattering Through a Quantum Dot: A Phase Lapse MechanismThe scattering phase shift of an electron transferred through a quantum dot is studied within a model Hamiltonian, accounting for both the electron--electron interaction in the dot and a finite…Yuval Oreg, Yuval Gefen·Jul 21, 1996SaveLearn
Comparing conductance quantization in quantum wires and Quantum Hall systemsWe propose a new calculation of the DC conductance of a 1-dimensional electron system described by the Luttinger model. Our approach is based on the ideas of Landauer and Büttiker and on the methods…Anton Yu. Alekseev, Vadim V. Cheianov, Jürg Fröhlich·Jul 21, 1996SaveLearn
Spreading of molecularly thin wetting films on solid interfacesIn this paper we study kinetics of spreading of thin liquid films on solid interfaces. We present an overview of current experimental picture and discuss available theoretical approaches and their…S. F. Burlatsky, A. M. Cazabat, M. Moreau et al.·Jul 21, 1996SaveLearn
New Evidence for ``Confined Coherence'' in Weakly Coupled Luttinger LiquidsOn the basis of a calculation of the exact interliquid hopping rate and an approximate single particle Green's function, we present new evidence for the existence of a phase of relevant but…David Clarke, Steven Strong·Jul 19, 1996SaveLearn
Irreversibility, Mechanical Entanglement and Thermal Melting in Superconducting Vortex Crystals with Point ImpuritiesWe discuss the onset of irreversibility and entanglement of vortex lines in high Tc superconductors due to point disorder and thermal fluctuations using a simplified cage model. A combination of…Deniz Ertas, David R. Nelson·Jul 19, 1996SaveLearn
Spectral properties of the planar t-J modelThe single-particle spectral functions A( k,ω) and self-energies Σ( k,ω) are calculated within the t-J model using the finite-temperature Lanczos method for small systems. A…J. Jaklic, P. Prelovsek·Jul 19, 1996SaveLearn
Observation of scaling behavior in a Coulomb blockade systemWe describe two experiments to study the influence of fluctuations in the electron charge on the transport properties of a quantum dot. First, we scan a device from single- to double quantum-dot…K. Flensberg, L. W. Molenkamp·Jul 19, 1996SaveLearn
Electron Counting Statistics and Coherent States of Electric CurrentA theory of electron counting statistics in quantum transport is presented. It involves an idealized scheme of current measurement using a spin 1/2 coupled to the current so that it precesses at the…L. S. Levitov, H. -W. Lee, G. B. Lesovik·Jul 19, 1996SaveLearn
Coulomb Blocking of Tunneling: From Zero-bias Anomaly to Coulomb GapWe present an effective action approach for the problem of Coulomb blocking of tunneling. The method is applied to the ``strong coupling'' problem arising near zero bias, where perturbation…L. S. Levitov, A. V. Shytov·Jul 19, 1996SaveLearn
Current and charge distributions of the fractional quantum Hall liquids with edgesAn effective Chern-Simons theory for the quantum Hall states with edges is studied by treating the edge and bulk properties in a unified fashion. An exact steady-state solution is obtained for a…Jun'ichi Shiraishi, Mahito Kohmoto·Jul 18, 1996SaveLearn