Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-04-18
Solid State Sciences 11, 935 (2009) [special issue on Solid state approaches to quantum information processing and communicati
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Proceedings E-MRS 2007, session on solid-state quantum information, 7 pages, 3 figures
Scientific paper
10.1016/j.solidstatesciences.200
We discuss a technique and a material system that enable the controlled realization of quantum entanglement between spin-wave modes of electron ensembles in two spatially separated pieces of semiconductor material. The approach uses electron ensembles in GaAs quantum wells that are located inside optical waveguides. Bringing the electron ensembles in a quantum Hall state gives selection rules for optical transitions across the gap that can selectively address the two electron spin states. Long-lived superpositions of these electron spin states can then be controlled with a pair of optical fields that form a resonant Raman system. Entangled states of spin-wave modes are prepared by applying quantum-optical measurement techniques to optical signal pulses that result from Raman transitions in the electron ensembles.
der Wal Caspar H. van
Sladkov Maksym
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