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Comment: 3 figures. to appear in PRL
Comment: revised version, curve for time correlations at nu=1/3 added
Comment: Proceedings of the 6th Rencontres du Vietnam, Hanoi (2006)
The combined presence of a Rashba and a Zeeman effect in a ballistic one-dimensional conductor generates a spin pseudogap and the possibility to propagate a beam with well defined spin orientation. Without interactions transmission through a barrier gives a relatively well polarized beam. Using renormalization group arguments, we examine how electron-electron interactions may affect the transmission coefficient and the polarization of the outgoing beam.
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