Controllable spin entanglement production in a quantum spin Hall ring
Mesoscale and Nanoscale Physics
2015-06-18 v2 Strongly Correlated Electrons
Quantum Physics
Abstract
We study the entanglement production in a quantum spin Hall ring geometry where electrons of opposite spins are emitted in pairs from a source and collected in two different detectors. Postselection of coincidence detector events gives rise to entanglement in the system, measurable through correlations between the outcomes in the detectors. We have chosen a geometry such that the entanglement depends on the dynamical phases picked up by the edge states as they move around the ring. In turn, the dependence of the phases on gate potential and Rashba interaction allows for a precise electrical control of the entanglement production in the ring.
Cite
@article{arxiv.1503.03985,
title = {Controllable spin entanglement production in a quantum spin Hall ring},
author = {Anders Ström and Henrik Johannesson and Patrik Recher},
journal= {arXiv preprint arXiv:1503.03985},
year = {2015}
}
Comments
11 pages, 6 figures. Published version, new Fig. 3, added reference