Entanglement of electron pairs extracted from a many-body system
Mesoscale and Nanoscale Physics
2015-05-13 v1 Strongly Correlated Electrons
Abstract
Entanglement of spins is analyzed for two electrons extracted from a mixed many electron state by projecting onto the two-electron subspace. The concurrence formulae are expressed in a compact form for states with a well defined square of the total spin projection. As an example, the thermal entanglement for a qubit pair with an anisotropic Heisenberg and the Dzyaloshinskii-Moriya interactions in an inhomogeneous magnetic field is given analytically. Remarkably, the concurrence of a pair of electrons with antiparallel spins and in a delocalised orbital state is given by the scalar product of the state with its spin-flipped state and not with the time-reversed state.
Keywords
Cite
@article{arxiv.0905.0115,
title = {Entanglement of electron pairs extracted from a many-body system},
author = {A. Ramsak and J. Mravlje and T. Rejec and A. Lautar},
journal= {arXiv preprint arXiv:0905.0115},
year = {2015}
}