Showing 1993Show all

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cond-mat1993★ 5 cited

Multiple Front Propagation Into Unstable States

R. Montagne, A. Amengual, E. Hernandez-Garcia +1

The dynamics of transient patterns formed by front propagation in extended nonequilibrium systems is considered. Under certain circumstances, the state left behind a front propagat…

patt-sol1993★ 5 cited

Multiple Front Propagation into Unstable States

R. Montagne, A. Amengual, E. Hernandez-Garcia +1

The dynamics of transient patterns formed by front propagation in extended nonequilibrium systems is considered. Under certain circumstances, the state left behind a front propagat…

hep-lat1993★ 1 cited

Adding Gauge Fields to Kaplan's Fermions

T. Blum, Leo Karkkainen

We experiment with adding dynamical gauge field to Kaplan (defect) fermions. In the case of U(1) gauge theory we use an inhomogenous Higgs mechanism to restrict the 3d gauge dynami…

hep-lat1993

Simple Matrix Elements with Dynamical Fermions

The High Energy Monte Carlo Grand Challenge

We report on studies of simple matrix elements from simulations with two flavors of sea quarks, both staggered and Wilson. We show the decay constants of vector and pseudoscalar me…

nucl-th1993★ 17 cited

Simple approximation for the starting-energy-independent two-body effective interaction with applications to 6Li

D. C. Zheng, B. R. Barrett, J. P. Vary +1

We apply the Lee-Suzuki iteration method to calculate the linked-folded diagram series for a new Nijmegen local NN potential. We obtain an exact starting-energy-independent effecti…

nucl-th1993

Higher-shell corrections for systems with one and two valence nucleons: A spin-orbit and tensor interaction analysis

D. C. Zheng, L. Zamick, M. Fayache

It is shown that when higher-shell admixtures are included for systems with two valence particles or holes, there are effects which are quite different from those for one-valence-n…

hep-lat1993★ 47 cited

Super-Instantons and the Reliability of Perturbation Theory in Non-Abelian Models

A. Patrascioiu, E. Seiler

In dimension the low temperature behavior of systems enjoying a continuous symmetry is dominated by super-instantons: classical configurations of arbitrarily low energy.…

nucl-th1993★ 4 cited

Nuclear shell-model calculations for 6Li and 14N with different NN potentials

D. C. Zheng, B. R. Barrett

Two ``phase-shift equivalent'' local NN potentials with different parametrizations, Reid93 and NijmII, which were found to give nearly identical results for the triton by Friar et…

hep-lat1993★ 22 cited

The nature of the thermal phase transition with Wilson quarks

Claude Bernard, Thomas A. DeGrand, Carleton DeTar +5

We describe a series of simulations of high temperature QCD with two flavors of Wilson quarks aimed at clarifying the nature of the high temperature phase found in current simulati…

hep-lat1993★ 103 cited

Critical Behaviour of the 3d Gross-Neveu and Higgs-Yukawa Models

L. Karkkainen, R. Lacaze, P. Lacock +1

We measure the critical exponents of the three dimensional Gross-Neveu model with two four-component fermions. The exponents are inferred from the scaling behaviour of observables…

hep-lat1993★ 27 cited

The Physical Phase of Dimensionally Reduced Gauge Theories

L. Karkkainen, P. Lacock, D. E. Miller +2

We investigate the relationship between the high temperature deconfined phase of the SU(2) gauge theory to the phases of the corresponding three dimensional adjoint Higgs model. Fo…

hep-lat1993★ 8 cited

Baryon Density Correlations in High Temperature Hadronic Matter

Claude Bernard, Thomas A. DeGrand, Carleton DeTar +4

As part of an ongoing effort to characterize the high temperature phase of QCD, in a numerical simulation using the staggered fermion scheme, we measure the quark baryon density in…

hep-lat1993★ 23 cited

Hadron Spectrum and Matrix Elements in QCD with Dynamical Wilson Fermions at 6/g^2=5.3

K. M. Bitar

We present results of a lattice simulation of quantum chromodynamics with two degenerate flavors of dynamic Wilson fermions at at each of two dynamical fermion hopping…

hep-lat1993★ 67 cited

Interface Tension in Quenched QCD

Y. Iwasaki, K. Kanaya, Leo Kärkkäinen +2

We calculate the tension of the interface between the confined and deconfined phases by the histogram method in SU(3) lattice gauge theory for temporal extents of 4 and 6 using…

hep-th1993★ 23 cited

Tau functions for the Dirac operator on the Poincare' disk

John Palmer, Morris Beatty, Craig A. Tracy

Correlation functions for holonomic fields on the Poincare' disk are analyzed. The two point functions are shown to be expressible in terms of Painleve' functions of type VI.

astro-ph1993★ 50 cited

The Optical Polarization Properties of X-ray Selected BL Lacertae Objects

B. T. Jannuzi, P. S. Smith, R. Elston

We discuss the optical polarization properties of X-ray selected BL Lacertae objects (XSBLs) as determined from three years of monitoring 37 BL Lac objects and candidates. The obse…

astro-ph1993★ 3 cited

The large-scale structure in a universe dominated by cold plus hot dark matter

Y. P. Jing, H. J. Mo, G. Boerner +1

Using numerical simulations, we investigate the large-scale gravitational clustering in a flat universe dominated by cold plus hot dark matter (i.e., $Ω_0=\ocdm+\ohdm+\obaryon=1$).…

astro-ph1993★ 12 cited

A Self-Consistent Model For The Long-Term Gamma-Ray Spectral Variability of Cygnus X-1

Fulvio Melia, Ranjeev Misra

The long-term transitions of the black hole candidate Cygnus X-1 (between the states gamma_1, gamma_2, and gamma_3) include the occasional appearance of a strong ~ MeV bump (gamma_…

hep-lat1993★ 29 cited

Spacelike Wilson Loops at Finite Temperature

L. Karkkainen, P. Lacock, D. E. Miller +2

In the high temperature phase of Yang-Mills theories, large spatial Wilson loops show area law behaviour with a string tension that grows with increasing temperature. Within the fr…

nucl-th1993★ 4 cited

Minimizing Effective Many-Body Interactions

B. R. Barrett, D. C. Zheng, R. J. McCarthy +1

A simple two-level model is developed and used to test the properties of effective interactions for performing nuclear structure calculations in truncated model spaces. It is shown…

chao-dyn1993★ 97 cited

The Effect of Focusing and Caustics on Exit Phenomena in Systems Lacking Detailed Balance

Robert S. Maier, Daniel L. Stein

We study the trajectories followed by a particle subjected to weak noise when escaping from the domain of attraction of a stable fixed point. If detailed balance is absent, a _focu…

chao-dyn1993★ 4 cited

Large Fluctuations in Stochastically Perturbed Nonlinear Systems: Applications in Computing

Robert S. Maier

This is the transcript of a talk given at the 1992 Complex Systems Summer School. The theory of large fluctuations of stochastically perturbed continuous-time dynamical systems is…

hep-lat1993★ 29 cited

Finite-size and quark mass effects on the QCD spectrum with two flavors

C. Bernard, T. Blum, T. DeGrand +5

We have carried out spectrum calculations with two flavors of dynamical Kogut-Susskind quarks on four lattice sizes from to at couplings that correspo…

comp-gas1993

Convergence of Convective-Diffusive Lattice Boltzmann Methods

Bracy H. Elton, Garry H. Rodrigue, C. David Levermore

Lattice Boltzmann methods are numerical schemes derived as a kinetic approximation of an underlying lattice gas. A numerical convergence theory for nonlinear convective-diffusive l…