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Now showing items 1-10 of 40

#### Exact solvability of potentials with spatially dependent effective masses

(Physics Letters, Section A: General, Atomic and Solid State Physics, 2000-10-02) [Artigo]

We discuss the relationship between exact solvability of the Schroedinger equation, due to a spatially dependent mass, and the ordering ambiguity. Some examples show that, even in this case, one can find exact solutions. ...

#### Classes of exact wave functions for general time-dependent Dirac Hamiltonians in 1+1 dimensions

(Physical Review A: Atomic, Molecular, and Optical Physics, 2003-05-01) [Artigo]

The construction of two classes of exact solutions for the most general time-dependent Dirac Hamiltonian in 1+1 dimensions was discussed. The extension of solutions by introduction of a time-dependent mass was elaborated. ...

#### Mapping deformed hyperbolic potentials into nondeformed ones

(Physics Letters, Section A: General, Atomic and Solid State Physics, 2005-05-23) [Artigo]

In this work we introduce a mapping between the so-called deformed hyperbolic potentials, which are presenting a continuous interest in the last few years, and the corresponding nondeformed ones. As a consequence, we ...

#### Fluctuating solutions for the evolution of domain walls

(Physics Letters B, 2009-08-17) [Artigo]

A class of oscillating Lorentz-covariant configurations for the evolution of the domain walls in diverse dimensions are analytically obtained. It is shown that the oscillating solutions in the case of domain walls are ...

#### Wigner distribution for a class of isospectral position-dependent mass systems

(Physica Scripta, 2008-09-01) [Artigo]

In this paper, we show how to construct a general class of non-relativistic quantum systems with position-dependent masses, which are isospectral to a given system with constant mass. Then, we use this approach in order ...

#### Restrictions over two-dimensional gauge models with Thirring-like interaction

(Journal of Physics A: Mathematical and Theoretical, 2007-11-02) [Artigo]

Some years ago, it was shown how fermion self-interacting terms of the Thirring-type impact the usual structure of massless two-dimensional gauge theories [1]. In that work only the cases of pure vector and pure chiral ...

#### Dirac equation exact solutions for generalized asymmetrical Hartmann potentials

(Physics Letters A, 2006-08-07) [Artigo]

In this work we solve the Dirac equation by constructing the exact bound state solutions for a mixing of vector and scalar generalized Hartmann potentials. This is done provided the vector potential is equal to or minus ...

#### Structural aspects of the fermion-boson mapping in two-dimensional gauge and anomalous gauge theories with massive fermions

(Annals of Physics, 2002-02-25) [Artigo]

Using a synthesis of the functional integral and operator approaches we discuss the fermion-buson mapping and the role played by the Bose field algebra in the Hilbert space of two-dimensional gauge and anomalous gauge field ...

#### Approximate analytical states of a polynomial potential: an example of symmetry restoration

(Physics Letters A, 2000-05-15) [Artigo]

An approximate analytical expression for the first two eigenvalues of the Schrodinger equation for the potential V(x) = Ax(4) + Bx(2) is achieved by using the Symanzik scaling symmetry. A kind of symmetry restoration when ...

#### Variational method for excited states from supersymmetric techniques

(Canadian Journal of Physics, 2003-11-01) [Artigo]

We suggest a method for constructing trial eigenfunctions for excited states to be used in the variational method. This method is a generalization of the one that uses a superpotential to obtain the trial functions for the ...