# Search results for: M. Feddi

Open Physics > 2008 > 6 > 1 > 97-104

Open Physics > 2008 > 6 > 1 > 97-104

Central European Journal of Physics > 2008 > 6 > 1 > 97-104

Open Physics > 2008 > 6 > 1 > 97-104

The problem of a shallow donor impurity located at the centre of a symmetrical paraboloidal quantum dot (SPQD) is solved exactly. The Schrödinger equation is separated in the paraboloidal coordinate system. Three different cases are discussed for the radial-like equations. For a bound donor, the energy is negative and the solutions are described by Whittaker functions. For a non-bound donor, the energy...

Open Physics > 2008 > 6 > 1 > 97-104

The problem of a shallow donor impurity located at the centre of a symmetrical paraboloidal quantum dot (SPQD) is solved exactly. The Schrödinger equation is separated in the paraboloidal coordinate system. Three different cases are discussed for the radial-like equations. For a bound donor, the energy is negative and the solutions are described by Whittaker functions. For a non-bound donor, the energy...

Central European Journal of Physics > 2008 > 6 > 1 > 97-104

The problem of a shallow donor impurity located at the centre of a symmetrical paraboloidal quantum dot (SPQD) is solved exactly. The Schrödinger equation is separated in the paraboloidal coordinate system. Three different cases are discussed for the radial-like equations. For a bound donor, the energy is negative and the solutions are described by Whittaker functions. For a non-bound donor, the energy...

In the present study, we determine exact analytical expressions for the currents and the voltages of the circuit known as diodes-bridge or Graetz bridge. This circuit is used in electronics as full wave rectifier, it is formed by four non-ideal identical diodes and one diagonal resistance. At the beginning, we determine analytical solution for the transcendental equation giving the output current...