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J. H. Asad

Publications and source records attributed to J. H. Asad.

13 recordsLinked to original sources
arXiv2013

Infinite Body Centered Cubic Network of Identical Resistors

We express the equivalent resistance between the origin and any other lattice site in an infinite Body Centered Cubic (BCC) network consisting of identical resistors each of resistance R rationally in terms of known values and . The equivalent resistance is then calculated. Finally, for large separation between the origin and the lattice site two asymptotic formulas for the resistance are presented and some numerical results with analysis are given.

physics.gen-ph↗
arXiv2012

Infinite Face Centered Cubic Network of Identical Resistors

The equivalent resistance between the origin and any other lattice site, in an infinite Face Centered Cubic network consisting from identical resistors, has been expressed rationally in terms of the known value and . The asymptotic behavior is investigated, and some calculated values for the equivalent resistance are presented.

physics.gen-ph↗
arXiv2011

Hamiltonian Formulation of Classical Fields with Fractional Derivatives

An investigation of classical fields with fractional derivatives is presented using the fractional Hamiltonian formulation. The fractional Hamilton's equations are obtained for two classical field examples. The formulation presented and the resulting equations are very similar to those appearing in classical field theory.

physics.gen-ph↗
arXiv2009

Infinite Networks of Identical Capacitors

The capacitance between the origin and any other lattice site in an infinite square lattice of identical capacitors is studied. The method is generalized to infinite Simple Cubic (SC) lattice. We make use of the superposition principle and the symmetry of the infinite grid

physics.gen-ph↗
arXiv2009

Capacitance between Two Points in an Infinite Grid

The capacitance between two adjacent nodes on an infinite square grid of identical capacitors can easily be found by superposition, and the solution is found by explotting the symmetry of the grid. The mathematical problem presented in this work involves the solution of an infinite set of linear, inhomogenous difference equations which are solved by the method of separation of variables.

physics.gen-ph↗
arXiv2009

Resistance Calculation for an infinite Simple Cubic Lattice- Application of Green's Function

It is shown that the resistance between the origin and any lattice point (l,m,n) in an infinite perfect Simple Cubic (SC) is expressed rationally in terms of the known value of G0(0,0,0). The resistance between arbitrary sites in a SC is also studied and calculated when one of the resistors is removed from the perfect lattice. Finally, the asymptotic behavior of the resistance for both the perfect and perturbed SC network is investigated

physics.gen-ph↗
arXiv2009

Perturbation of an infinite Network of Identical Capacitors

The capacitance between any two arbitrary lattice sites in an infinite square lattice is studied when one bond is removed (i.e. perturbed). A connection is made between the capacitance and the Lattice Green's Function of the perturbed network, where they are expressed in terms of those of the perfect network. The asymptotic behavior of the perturbed capacitance is investigated as the separation between the two sites goes to infinity. Finally, numerical results are obtained along different directions and a comparison is carried out with the perfect capacitances

physics.gen-ph↗
arXiv2009

Differential Equation Approach for One- and Two- Dimensional Lattice Green's Function

A first order differential equation of Green's Function, at the origin G(0), for the one- dimensional lattice is derived by simple recurrence relation. Green's Function at site (m)is then calculated in terms of G(0). A simple recurrence relation connecting the lattice Green's Function at the site (m,n)and the first derivative of the lattice Green's Function at the site (m+_1,n)is presented for the two- dimensional lattice, a differential equation of the second order in G(0,0) is obtained. By making use of the letter recurrence relation, lattice Green's Function at an arbitrary site is obtained in closed form. Finally, the phase shift and scattering cross section are evaluated analytically and numerically for one- and two impurities.

physics.gen-ph↗
arXiv2009

On the resistance of an Infinite Square Network of Identical Resistors- Theoretical and Experimental Comparison

A review of the theoretical approach for calculating the resistance between two arbitrary lattice points in an infinite square lattice (perfect and perturbed cases)is carried out using the Lattice Green's Function. We show how to calculate the resistance between the origin and any other site using the Lattice Green's Function at the origin, and its derivatives. Experimental results are obtained for a finite square network consisting 30x30 identical resistors, and a comparison with those obtained theoretically is presented.

physics.gen-ph↗
arXiv2009

Infinite Network of Identical Capacitors by Green's Function

The capacitance between arbitrary nodes in perfect infinite networks of identical capacitors is studied. We calculate the capacitance between the origin and the lattice site (l,m)for an infinite linear chain, and for an infinite square network consisting of identical capacitors using the lattice green's function. The asymptotic behavior of the capacitance for an infinite square lattice is investigated for large separation between the origin and the site (l,m). We point out the relation between the capacitance of the lattice and the van Hove singularity of the tight- binding Hamiltonian. This method can be applied to other types of lattice structures.

physics.gen-ph↗
arXiv2009

Infinite Simple 3D Cubic Lattice of Identical Resistors (Two Missing Bonds)

An infinite regular three-dimensional network is composed of identical resistors each of resistance joining adjacent nodes. What is the equivalent resistance between the lattice site and the lattice site, when two bonds are removed from the perfect network? Three cases are considered here, and some numerical values are calculated. Finally, the asymptotic behavior of the equivalent resistance is studied for large distances between the two sites.

cond-mat.other↗