Diatomic molecule as a quantum entanglement switch

Details Diatomic molecule as a quantum entanglement switch Diatomic molecule as a quantum entanglement switch

2007-04-05

arxiv.org/abs/0704.0743v2

Physica B 403, 1534 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

To be presented on "The International Conference on Strongly Correlated Electron Systems" SCES'07, May 13-18, Houston, USA

Scientific paper

10.1016/j.physb.2007.10.182

We investigate a pair entanglement of electrons in diatomic molecule, modeled as a correlated double quantum dot attached to the leads. The low-temperature properties are derived from the ground state obtained by utilizing the Rejec-Ramsak variational technique within the framework of EDABI method, which combines exact diagonalization with ab initio calculations. The results show, that single-particle basis renormalization modifies the entanglement-switch effectiveness significantly. We also found the entanglement signature of a competition between an extended Kondo and singlet phases.

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