Continuum Wannier-Stark Ladders Strongly Coupled by Zener Resonances in Semiconductor Superlattices

Bloch oscillations and Wannier Stark Ladder study in Semiconductor Superlattices

Président du jury : François JULIEN Directeur de Recherches(HDR), IEF – Univ. Paris Sud Rapporteurs : Olivier GAUTHIER-LAFAYE Chargé de Recherches(HDR), LAASUniv. Paul Sabatier Dominique COQUILLAT Directeur de Recherches(HDR), L2C –Univ. Montpellier 2 Examinateurs : Robson FERREIRA Directeur de Recherches(HDR), LPA – ENS de Paris Bloch oscillations and Wannier Stark Ladder study in Semiconducto...

Bloch oscillations and Wannier-Stark localization in semiconductor superlattices

Ever since the initial applications of quantum mechanics to the dynamics of electrons in solids, the analysis of Bloch electrons moving in a homogeneous electric field has been of central importance. By employing semiclassical arguments, in 1928 Bloch [1] demonstrated that, a wave packet given by a superposition of single-band states peaked about some quasimomentum, h̄k, moves with a group veloc...

Bloch oscillations, Zener tunneling, and Wannier-Stark ladders in the time domain.

Atomic Landau-Zener tunneling and Wannier-Stark ladders in optical potentials.

We calculate the quantum motion of ultracold atoms in an accelerating optical potential, and show how they may be used to observe Landau-Zener tunneling and Wannier-Stark ladders, two fundamental quantum effects in solid state physics. The optical potential is spatially periodic, yielding an energy spectrum of Bloch bands for the atoms. The acceleration provides an inertial force in the moving ...

Stark-wannier Ladders and Cubic Exponential Sums