Optimal spin-entangled electron-hole pair pump
Mesoscale and Nanoscale Physics
2007-05-23 v2 Quantum Physics
Abstract
A nonperturbative theory is presented for the creation by an oscillating potential of spin-entangled electron-hole pairs in the Fermi sea. In the weak potential limit, considered earlier by Samuelsson and Buttiker, the entanglement production is much less than one bit per cycle. We demonstrate that a strong potential oscillation can produce an average of one Bell pair per two cycles, making it an efficient source of entangled flying qubits.
Keywords
Cite
@article{arxiv.cond-mat/0502055,
title = {Optimal spin-entangled electron-hole pair pump},
author = {C. W. J. Beenakker and M. Titov and B. Trauzettel},
journal= {arXiv preprint arXiv:cond-mat/0502055},
year = {2007}
}
Comments
6 pages including 1 figure -- Two appendices contain material that is not in the Journal version: A) Gaussian elimination for fermions; B) class of optimal pump cycles