Spin-dependent current noises in transport through coupled quantum dots

Abstract

Current fluctuations can provide additional insight into quantum transport in mesoscopic systems. The present work is carried out for the fluctuation properties of transport through a pair of coupled quantum dots which are connected with ferromagnetic electrodes. Based on an efficient particle-number-resolved master equation approach, we are concerned with not only fluctuations of the total charge and spin currents, but also of each individual spin-dependent component. As a result of competition among the spin polarization, Coulomb interaction, and dot-dot tunnel coupling, rich behaviors are found for the self- and mutual-correlation functions of the spin-dependent currents.

15 pages, 4 figure, and 2 tables

References in corpus (6)

• Shot Noise of a Quantum Shuttle
• Noise enhancement due to quantum coherence in coupled quantum dots
• Relaxation and Zeno effect in qubit measurements
• Spontaneous Relaxation of a Charge Qubit under Electrical Measurement
• Spin-Flip Noise in a Multi-Terminal Spin-Valve
• Electron Bunching in Stacks of Coupled Quantum Dots