Frequency-dependent current noise through quantum-dot spin valves

Spin Selection Through a Quantum Dot

621 Staying in Sync In parallel processing, computational tasks are assigned to many computers at once. However, a difficulty is that when several computers are working independently, one processor can get well ahead of the others on its part of the problem. As a result, progress tends to diverge or spread greatly as the number of processors used increases. Korniss et al. (p. 677; see the Persp...

Quantum current modeling in nano-transistors with a quantum dot

Carbon quantum dots (CQDs) serve as a new class of ‘zero dimensional’ nanomaterial’s in thecarbon class with sizes below 10 nm. As light emitting nanocrystals, QDs are assembled from semiconductormaterials, from the elements in the periodic groups of II-VI, III-V or IV-VI, mainly thanks to impacts of quantum confinement QDs have unique optical properties such as brighter, highly pho...

Bistability in the Electric Current through a Quantum-Dot Capacitively Coupled to a Charge-Qubit

We investigate the electronic transport through a single-level quantum-dot which is capacitively coupled to a charge-qubit. By employing the method of nonequilibrium Green's functions, we calculate the electric current through quantum dot at finite bias voltages. The Green's functions and self-energies of the system are calculated perturbatively and self-consistently to the second order of inte...

Current and Noise in a FM/quantum dot/FM System

F. M. Souza, J. C. Egues and A. P. Jauho 1 Mikroelektronik Centret, Danmarks Tekniske Universitet, DK-2800 Kgs. Lyngby, Denmark 2 Departamento de Fı́sica e Informática, Instituto de Fı́sica de São Carlos, Universidade de São Paulo, 13560-970 São Carlos, São Paulo, Brazil. 3 Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland (Dated: February...

Spin-polarized current and shot noise in the presence of spin flip in a quantum dot via nonequilibrium Green's functions