Phys. Rev. Lett. 94, 186804 (2005) [4 pages]Optimal Spin-Entangled Electron-Hole Pair PumpReceived 2 February 2005; published 10 May 2005 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 Büttiker, the entanglement production is much less than 1 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.186804
DOI:
10.1103/PhysRevLett.94.186804
PACS:
73.23.−b, 03.67.Mn, 05.30.Fk, 05.60.Gg
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