Localization in an inhomogeneous quantum wire

Localization in an inhomogeneous quantum wire

We study interaction-induced localization of electrons in an inhomogeneous quasi-one-dimensional system—a wire with two regions, one at low density and the other high. Quantum Monte Carlo techniques are used to treat the strong Coulomb interactions in the low-density region, where localization of electrons occurs. The nature of the transition from high to low density depends on the density grad...

Localization transition in a ballistic quantum wire

H. Steinberg,1 O. M. Auslaender,1,* A. Yacoby,1 J. Qian,2 G. A. Fiete,2,3 Y. Tserkovnyak,2 B. I. Halperin,2 K. W. Baldwin,4 L. N. Pfeiffer,4 and K. W. West4 1Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel 2Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138, USA 3Kavli Institute for Theoretical Physics, University of Cali...

Hartree-Fock calculations of a nite inhomogeneous quantum wire

Localization and fractality in inhomogeneous quantum walks with self-duality.

We introduce and study a class of discrete-time quantum walks on a one-dimensional lattice. In contrast to the standard homogeneous quantum walks, coin operators are inhomogeneous and depend on their positions in this class of models. The models are shown to be self-dual with respect to the Fourier transform, which is analogous to the Aubry-André model describing the one-dimensional tight-bindi...

Effect of asymmetric quantum dot rings in electron transport through a quantum wire

The electronic conductance at zero temperature through a quantum wire with side-connected asymmetric quantum ring (as a scatter system) is theoretically studied using the non-interacting Hamiltonian Anderson tunneling method. In this paper we concentrate on the configuration of the quantum dot rings. We show that the asymmetric structure of QD-scatter system strongly influences the amplitude an...