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author = "Martinez, D."
<< < 3 4 5 6 7 > >>

Found 113 documents, displaying page 5 of 12

Comparison of Spectral Method and Lattice Boltzmann Simulations of Two-Dimensional Hydrodynamics

Author(s) : Martinez, D. O. , Matthaeus, W. H. , Chen, S. , Montgomery, D. C.
Description : We present numerical solutions of the two-dimensional Navier-Stokes equations by two methods; spectral and the novel Lattice Boltzmann Equation (LBE) scheme. Very good agreement is found for global quantities as well as energy spectra. The LBE scheme is, indeed, providing reasonably accurate solut...
Repository : arXiv
Language(s) : Undetermined

A novel shear flow instability triggered by a chemical reaction in the absence of inertia

Author(s) : Burghelea, T. , Wielage-Burchard, K. , Frigaard, I. A. , Martinez, D. M. , Feng, J. J.
Description : We present an experimental investigation of a novel low Reynolds number shear flow instability triggered by a chemical reaction. An acid-base reaction taking place at the interface between a Newtonian fluid and Carbopol-940 solution leads to a strong viscosity stratification, which locally destabi...
Repository : arXiv
Language(s) : Undetermined

The su(1,1) dynamical algebra from the Schr\"odinger ladder operators for N-dimensional systems: hydrogen atom, Mie-type potential, harmonic oscillator and pseudo-harmonic oscillator

Author(s) : Martinez, D. , Flores-Urbina, J. C. , Mota, R. D. , Granados, V. D.
Description : We apply the Schr\"odinger factorization to construct the ladder operators for hydrogen atom, Mie-type potential, harmonic oscillator and pseudo-harmonic oscillator in arbitrary dimensions. By generalizing these operators we show that the dynamical algebra for these problems is the $su(1,1)$ Lie a...
Repository : arXiv
Language(s) : Undetermined

The su(1,1) Dynamical Algebra for the Generalized MICZ-Kepler Problem from the Schr\"odinger Factorization

Author(s) : Salazar-Ramirez, M. , Martinez, D. , Mota, V. D. Granados R. D.
Description : We apply the Schr\"odinger factorization to construct the generators of the dynamical algebra $su(1,1)$ for the radial equation of the generalized MICZ-Kepler problem. , Comment: 11 pages
Repository : arXiv
Language(s) : Undetermined

An $su(1,1)$ algebraic approach for the relativistic Kepler-Coulomb problem

Author(s) : Salazar-Ramírez, M. , Martínez, D. , Mota, R. D. , Granados, V. D.
Description : We apply the Schr\"odinger factorization method to the radial second-order equation for the relativistic Kepler-Coulomb problem. From these operators we construct two sets of one-variable radial operators which are realizations for the $su(1,1)$ Lie algebra. We use this algebraic structure to obta...
Repository : arXiv
Language(s) : Undetermined

su(1,1) Algebraic approach of the Dirac equation with Coulomb-type scalar and vector potentials in D + 1 dimensions

Author(s) : Salazar-Ramírez, M. , Martínez, D. , Mota, R. D. , Granados, V. D.
Description : We study the Dirac equation with Coulomb-type vector and scalar potentials in D + 1 dimensions from an su(1, 1) algebraic approach. The generators of this algebra are constructed by using the Schr\"odinger factorization. The theory of unitary representations for the su(1, 1) Lie algebra allows us ...
Repository : arXiv
Language(s) : Undetermined

Efficient intrinsic spin relaxation in graphene due to flexural distortions

Author(s) : Fratini, S. , Gosálbez-Martínez, D. , Cámara, P. Merodio , Fernández-Rossier, J.
Description : We propose an intrinsic spin scattering mechanism in graphene originated by the interplay of atomic spin-orbit interaction and the local curvature induced by flexural distortions of the atomic lattice. Starting from a multiorbital tight-binding Hamiltonian with spin-orbit coupling considered non-p...
Repository : arXiv
Language(s) : Undetermined

Spin-filtered edge states in graphene

Author(s) : Gosálbez-Martínez, D. , Soriano, D. , Palacios, J. J. , Fernández-Rossier, J.
Description : Spin orbit coupling changes graphene, in principle, into a two-dimensional topological insulator, also known as quantum spin Hall insulator. One of the expected consequences is the existence of spin-filtered edge states that carry dissipationless spin currents and undergo no back-scattering in the...
Repository : arXiv
Language(s) : Undetermined

On the supersymmetry of the Dirac-Kepler problem plus a Coulomb-type scalar potential in D+1 dimensions and the generalized Lippmann-Johnson operator

Author(s) : Martinez, D. , Salazar-Ramirez, M. , Mota, R. D. , Granados, V. D.
Description : We study the Dirac-Kepler problem plus a Coulomb-type scalar potential by generalizing the Lippmann-Johnson operator to D spatial dimensions. From this operator, we construct the supersymmetric generators to obtain the energy spectrum for discrete excited eigenstates and the radial spinor for the ...
Repository : arXiv
Language(s) : Undetermined

GnRH, anosmin-1 and FGFR1 immunoreactivity in the developing human brain

Author(s) : Gonzalez-Martinez, D , Winyard, P , Woolf, AS , Bouloux, PM
Description :
Repository : UCL Eprints
Language(s) : Undetermined
<< < 3 4 5 6 7 > >>

Found 113 documents, displaying page 5 of 12