Diatomic molecule as a quantum entanglement switch

Adam Rycerz

doi:10.1016/j.physb.2007.10.182

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arXiv · 0704.0743

Diatomic molecule as a quantum entanglement switch

Adam Rycerz

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Abstract

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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Adam Rycerz. 2007-04-16. Diatomic molecule as a quantum entanglement switch. https://doi.org/10.1016/j.physb.2007.10.182

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