Cross-correlations in transport through parallel quantum dots

• DOI: 10.48550/arxiv.0802.3579
• Publication Date: 2008-01-01
• Authors: Haupt, Sebastian; Aghassi, Jasmin; Hettler, Matthias H.; Schön, Gerd
• Keywords: Technology; ddc:600; Condensed Matter - Mesoscale and Nanoscale Physics; 0103 physical sciences; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); info:eu-repo/classification/ddc/600; FOS: Physical sciences; 600; 01 natural sciences

10 pages, 4 figures submitted to PRL<br/>We investigate cross-correlations in the tunneling currents through two parallel quantum dots coupled to independent electrodes and gates and interacting via an inter-dot Coulomb interaction. The correlations reveal additional information, beyond what can be learned from the current or conductance, about the dynamics of transport processes of the system. We find qualitatively different scenarios for the dependence of the cross-correlations on the two gate voltages. Reducing the temperature below the inter-dot Coulomb interaction, regions of a given sign change from spherical shapes to angular L-shapes or stripes. Similar shapes have been observed in recent experiments.<br/>