Open AccessThe persistent current in a mesoscopic Aharonov-Bohm ring with a series-coupled double quantum dot
Author(s) -
Shengbao Wu,
Xiongwen Chen,
Weidong Sun,
Shun-Jin Wang
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.2336
Subject(s) - mesoscopic physics , persistent current , physics , hamiltonian (control theory) , quantum dot , kondo effect , quantum mechanics , parity (physics) , ground state , series (stratigraphy) , condensed matter physics , slave boson , boson , quantum , quantum electrodynamics , magnetic field , superconductivity , impurity , mathematics , hubbard model , mathematical optimization , paleontology , biology
We study theoretically the properties of the ground state of a mescopic ring with a seriescoupled double quantum dot in the Kondo regime by means of the two-inpurity Anderson Hamiltonian. The Hamiltonian is solved by means of the slave-boson mean-field theory. It is shown that two dots can be coupled coherently, which is reflected in the appearance of parity effects and the complex current-phase relation in this system. This system might be a possile candidate for future device applications.