Work

Fully analytical equation of motion approach for the double quantum dot in the Coulomb blockade regime

Year: 2024

Type: article

Abstract: A fully analytical approach based on the equation of motion technique to investigate the spectral properties and orbital occupations in an interacting double quantum dot in equilibrium is presented. By solving a linear system for the density correlators analytically, an explicit expression for the one-body Green's function in terms of local occupations, intra- and interdot Coulomb interactions, and the model parameters is derived. In the uncontacted limit, the results coincide with those obtained from the grand canonical ensemble. The analytical results compare favorably with numerical results obtained with the noncrossing approximation and the hierarchical equation of motion methods accurately reproducing peak positions and spectral weight distributions in the Coulomb blockade regime.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.110.115121

Authors: Nahual Sobrino, David Jacob, Stefan Kurth

Institutions: University of the Basque Country, Ikerbasque, Donostia International Physics Center

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Eusko Jaurlaritza, Euskal Herriko Unibertsitatea, Ministerio de Ciencia e Innovación, Agencia Estatal de Investigación