3,130 research outputs found
Integral equations for three-body Coulombic resonances
We propose a novel method for calculating resonances in three-body Coulombic
systems. The method is based on the solution of the set of Faddeev and
Lippmann-Schwinger integral equations, which are designed for solving the
three-body Coulomb problem. The resonances of the three-body system are defined
as the complex-energy solutions of the homogeneous Faddeev integral equations.
We show how the kernels of the integral equations should be continued
analytically in order that we get resonances. As a numerical illustration a toy
model for the three- system is solved.Comment: 9 pages, 1 EPS figur
Energetic electron transport in the presence of magnetic perturbations in magnetically confined plasmas
The transport of energetic electrons is sensitive to magnetic perturbations.
By using 3D numerical simulation of test particle drift orbits we show that the
transport of untrapped electrons through an open region with magnetic
perturbations cannot be described by a diffusive process. Based on our test
particle simulations, we propose a model that leads to an exponential loss of
particles.Comment: Accepted for publication in Journal of Plasma Physics (Energetic
Electrons special issue
A PNJL model in 0+1 Dimensions
We formulate the Polyakov-Nambu-Jona-Lasinio (PNJL) model in 0+1 dimensions.
The thermodynamics captured by the partition function yields a bulk pressure,
as well as quark susceptibilities versus temperature that are similar to the
ones in 3+1 dimensions. Around the transition temperature the behavior in the
pressure and quark susceptibilities follows from the interplay between the
lowest Matsubara frequency and the Polyakov line. The reduction to the lowest
Matsubara frequency yields a matrix Model. In the presence of the Polyakov line
the UV part of the Dirac spectrum features oscillations when close to the
transition temperature.Comment: 18 pages, 13 figure
RIGOROUS ADJUSTMENT OF A TRAVERSE
In the first part of this paper computation of traverses tied and oriented at both ends
was introduced by means of direct observation, based on the principle of the least squares.
In the following part formulas were shown for determining measures of accuracy for surch
traverses. After the theoretical chapters, applicibility was proved by means of a numerical
example
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