Now showing items 21-28 of 28
Inflow boundary conditions in quantum transport theory
(Hindawi Publishing Corporation, 1999)
A linear (given potential) steady-state Wigner equation is considered in conjunction with inflow boundary conditions and relaxation-time terms. A brief review of the use of inflow conditions in the classical case is also ...
Scaling regimes and critical dimensions in the Kardar-Parisi-Zhang problem
(E D P Sciences, 1999-07-01)
Charge assignments in multiple-U(1) gauge theories
(American Physical Society, 1999-12-01)
We discuss the choice of gauge field basis in multiple-U(1) gauge theories. We find that there is a preferred basis, specified by the charge orthogonality condition, in which the U(1) gauge fields do not mix under one-loop ...
Delta isobar masses, large N-c relations, and the quark model
(American Physical Society, 1999-01-01)
Motivated by recent remarks on the Delta(+) mass and comparisons between the quark model and relations based on large-iri, with perturbative flavor breaking, two sets of Delta masses consistent with these constraints are ...
Continuum theory of vacancy-mediated diffusion
(American Physical Society, 1999-06)
We present and solve a continuum theory of vacancy-mediated diffusion (as evidenced, for example, in the vacancy driven motion of tracers in crystals). We restrict our attention to ultralow vacancy densities, so that a ...
Asymptotics of the scattering coefficients for a generalized Schrödinger equation
(AIP Publishing, 1999-08)
The generalized Schrodinger equation d(2)psi/dx(2) + F(k)psi=[ikP(x) + Q(x)]psi is considered, where P and Q are integrable potentials with finite first moments and F satisfies certain conditions. The behavior of the ...
14-year program monitoring the flux densities of 33 radio sources at low frequencies
(IOP PUBLISHING LTD, 1999-01)
We present the results of a low-frequency flux density monitoring program of 33 extragalactic radio sources. The light curves at 318 and 430 MHz over a 14 yr period are presented. The measurements were made with the NAIC ...