Europhys. Lett.
Volume 74, Number 5, June 2006
Page(s) 764 - 770
Section General
Published online 26 April 2006
Europhys. Lett., 74 (5), pp. 764-770 (2006)
DOI: 10.1209/epl/i2005-10584-1

Entanglement between static and flying qubits in quantum wires

J. H. Jefferson1, A. Ramsak2 and T. Rejec2, 3

1  QinetiQ, Sensors and Electronics Division - St. Andrews Road Great Malvern, UK
2  Faculty of Mathematics and Physics, University of Ljubljana, J. Stefan Institute Ljubljana, Slovenia
3  Ben-Gurion University - Beer Sheva, Israel

received 25 November 2005; accepted in final form 3 April 2006
published online 26 April 2006

A weakly bound electron in a semiconductor quantum wire is shown to become entangled with an itinerant electron via the Coulomb interaction. The degree of entanglement and its variation with energy of the injected electron, may be tuned by choice of spin and initial momentum. Full entanglement is achieved close to energies where there are spin-dependent resonances. Possible realisations of related device structures are discussed.

03.67.Mn - Entanglement production, characterization, and manipulation.
73.63.-b - Electronic transport in nanoscale materials and structures.

© EDP Sciences 2006