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7 papers · 1 filter
Optimizing the Zel'dovich Approximation
A. L. Melott, T. F. Pellman, S. F. Shandarin
We have recently learned that the Zeldovich approximation can be successfully used for a far wider range of gravitational instability scenarios than formerly proposed; we study her…
Hamiltonian SU(N) Lattice Gauge Theories With Exact Vacuum States In 2+1 Dimensions
G. Frichter, D. Robson
We investigate (2+1)-d Hamiltonian lattice gauge theory using a class of Hamiltonians having exactly known vacuum states. These theories are shown to have a wide range of possible…
Quantitative Analysis of Voids in Percolating Structures in Two-Dimensional N-Body Simulations
P. M. Harrington, A. L. Melott, S. F. Shandarin
We present in this paper a quantitative method for defining void size in large-scale structure based on percolation threshold density. Beginning with two-dimensional gravitational…
Testing the Frozen-Flow Approximation
Adrian L. Melott, Francesco Lucchin, Sabino Matarrese +1
We investigate the accuracy of the frozen--flow approximation (FFA), recently proposed by Matarrese \etal (1992), for following the nonlinear evolution of cosmological density fluc…
Isospin Multiplet Structure in Ultra--Heavy Fermion Bound States
Pankaj Jain, Alan J. Sommerer, Douglas W. McKay +3
The coupled Bethe--Salpeter bound state equations for a system, where is a degenerate, fourth generation, super--heavy quark doublet, are solved in several ladd…
q\bar q$ bound states in the Bethe-Salpeter formalism
P. Jain, H. J. Munczek
We solve the Bethe-Salpeter equation in order to calculate the spectrum of pseudoscalar, vector and scalar meson bound states for light as well as heavy quarks, extending our previ…