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Condensed Matter papers — page 235

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Perturbation Theory for Classical Solids
The first well founded perturbation theory for classical solid systems is presented. Theoretical approaches to thermodynamic and structural properties of the hard-sphere solid provide us with the…
C. Rascon, L. Mederos, G. NavascuesSep 1, 1996
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Zero-Temperature Phase Transitions of Antiferromagnetic Ising Model of General Spin on a Triangular Lattice
We map the ground-state ensemble of antiferromagnetic Ising model of spin-S on a triangular lattice to an interface model whose entropic fluctuations are proposed to be described by an effective…
C. Zeng, C. L. HenleyAug 31, 1996
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Critical Dynamics of Self-Organizing Eulerian Walkers
The model of self-organizing Eulerian walkers is numerically investigated on the square lattice. The critical exponents for the distribution of a number of steps (τl) and visited sites (τs)…
R. R. Shcherbakov, Vl. V. Papoyan, A. M. PovolotskyAug 31, 1996
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Bethe ansatz equations for quantum chains combining different representations of su(3)
The general expression for the local matrix of a quantum chain L(θ) with the site space in any representation of su(3) is obtained. This is made by generalizing L(θ) from the fundamental…
J. Abad, M. RiosAug 30, 1996
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Numerical confirmation of universality of transmission micro-symmetry relations in a four-probe quantum dot
We study the crossover behavior of the Hall resistance between the integer quantum Hall regime and a regime dominated by the Aharonov-Bohm oscillations, in a system of 4-probe quantum dot with an…
Ming Lei, Hong GuoAug 30, 1996
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One-dimensional pair-hopping and attractive Hubbard models: A comparative study
The low-energy physics of the one-dimensional Pair-Hopping (PH) and attractive Hubbard models are expected to be similar. Based on numerical calculations on small chains, several authors have…
Mathias van den Bossche, Michel CaffarelAug 30, 1996
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Flux State in von Neumann lattice and Fractional Hall Effect
Formulation of quantum Hall dynamics using von Neumann lattice of guiding center coordinates is presented. A topological invariant expression of the Hall conductance is given and a new mean field…
Kenzo Ishikawa, Nobuki MaedaAug 30, 1996
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Nonlinear optical response from excitons in soliton lattice systems
Exciton effects on conjugated polymers and the resulting optical nonlinearities are investigated in soliton lattice systems. The magnitude of the THG at the 10 percent doping increases by the factor…
Kikuo HarigayaAug 30, 1996
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Density matrix renormalisation group for a quantum spin chain at non-zero temperature
We apply a recent adaptation of White's density matrix renormalisation group (DMRG) method to a simple quantum spin model, the dimerised XY chain, in order to assess the applicabilty of the…
R. J. Bursill, T. Xiang, G. A. GehringAug 30, 1996
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Repulsive particles on a two-dimensional lattice
The problem of finding the minimum-energy configuration of particles on a lattice, subject to a generic short-ranged repulsive interaction, is studied analytically. The study is relevant to charge…
G. I. WatsonAug 29, 1996
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Charge Excitations in Doped Mott Insulator in One Dimension
The doped Mott insulator in one dimension has been studied based on the phase Hamiltonian with the Umklapp scattering process, in which the charge degree of freedom is described by the quantum…
Michiyasu Mori, Hidetoshi FukuyamaAug 29, 1996
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Electrostatics of Lipid Bilayer Bending
The electrostatic contribution to spontaneous membrane curvature is calculated within Poisson-Boltzmann theory under a variety of assumptions and emphasizing parameters in the physiological range.…
Tom Chou, Marko V. Jaric', Eric D. SiggiaAug 29, 1996
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Charge localization around disclinations in monolayer graphite
Using a continuum model, we obtain qualitative results that imply charge localization around negative curvature disclinations (i.e. rings with more than 6 Carbon atoms) in a graphite sheet.…
Claudio Furtado, Fernando MoraesAug 29, 1996
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A Numerical Study of Ultrametricity in Finite Dimensional Spin Glasses
We use a constrained Monte Carlo technique to analyze ultrametric features of a 4 dimensional Edwards-Anderson spin glass with quenched couplings J= 1. We find that in the large volume limit an…
Angelo Cacciuto, Enzo Marinari, Giorgio ParisiAug 29, 1996
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Scaling of Particle Trajectories on a Lattice II: The Critical Region
The scaling behavior of the closed trajectories of a moving particle generated by randomly placed rotators or mirrors on a square or triangular lattice in the critical region are investigated. We…
Meng-she Cao, E. G. D. CohenAug 29, 1996
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Scaling of Particle Trajectories on a Lattice I: Critical Behavior
The scaling behavior of the closed trajectories of a moving particle generated by randomly placed rotators or mirrors on a square or triangular lattice is studied numerically. For most concentrations…
Meng-she Cao, E. G. D. CohenAug 29, 1996
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Frequency dependent admittance of a two-dimensional quantum wire
The frequency dependent conductance of a two-dimensional quantum wire is computed using a current conserving formalism. The correction to the dc-conductance due to a time-dependent potential is…
Jian Wang, Hong GuoAug 29, 1996
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The lamellar-to-isotropic transition in ternary amphiphilic systems
We study the dependence of the phase behavior of ternary amphiphilic systems on composition and temperature. Our analysis is based on a curvature elastic model of the surfactant film with…
U. S. Schwarz, K. Swamy, G. GompperAug 29, 1996
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On the VC-dimension of neural networks with binary weights
We investigate the VC-dimension of the perceptron and simple two-layer networks like the committee- and the parity-machine with weights restricted to values 1. For binary inputs, the…
S. Mertens, A. EngelAug 29, 1996
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Magnetic Field Symmetry of Dynamic Capacitances
While the static capacitance matrix is always symmetric and thus an even function of the magnetic field, the dynamic capacitance matrix of multi-terminal samples obeys in general only the weaker…
T. Christen, M. ButtikerAug 29, 1996
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Reply to the Comment on `` Moving glass phase of driven lattices ''
It was shown in our Letter that the novel glassy property of the moving lattice (transverse critical force and pinned channels) originate only from the periodicity in the transverse…
Thierry Giamarchi, Pierre Le DoussalAug 29, 1996
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Initial Stages of Bose-Einstein Condensation
We present the quantum theory for the nucleation of Bose-Einstein condensation in a dilute atomic Bose gas. This quantum theory comfirms the results of the semiclassical treatment, but has the…
H. T. C. StoofAug 29, 1996
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Local Percolation Probabilities for a Natural Sandstone
Local percolation probabilities are used to characterize the connectivity in porous and heterogeneous media. Together with local porosity distributions they allow to predict transport properties…
R. Hilfer, T. Rag, B. VirgiAug 29, 1996
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Replica structure of one--dimensional Ising models
We analyse the eigenvalue structure of the replicated transfer matrix of one-dimensional disordered Ising models. In the limit of n → 0 replicas, an infinite sequence of transfer matrices…
M. Weigt, R. MonassonAug 29, 1996
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Level statistics in the quantum Hall regime
The statistical properties of energy eigenvalues in the critical regime of the lowest Landau band are investigated. The nearest neighbour level spacing distribution P(s) and the Mehta quantity…
M. Batsch, L. SchweitzerAug 29, 1996
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