Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 29: Transport: Quantum Coherence and Quantum Information Systems - Part 1
TT 29.7: Vortrag
Donnerstag, 30. März 2006, 11:30–11:45, HSZ 304
Optimal spin-entangled electron-hole pair pump — •Mikhail Titov1, Carlo Beenakker2, and Bjorn Trauzettel2 — 1University of Konstanz, Department of Physics, Germany — 2Instituut Lorentz, Universiteit Leiden, The Netherlands
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.