Related papers: All-Electric Quantum Point Contact Spin Valve

The paper has been withdrawn by the author because the result obtained has been reported earlier by other authors.

This paper has been withdrawn by the authors, due to the discovery of paper 0201028 which predates it and contains most of it's results.

This paper has been withdrawn by the author due to some mistakes

This paper has been withdrawn by the author because the arguments presented in the paper is incomplete.

This paper has been withdrawn by the author

This paper has been withdrawn by the authors due to an error first noted by M. Lukin.

The paper is withdrawn by the author due to a recently discovered flaw in a basic proof.

This paper has been withdrawn by the author due to an error.

This paper has been withdrawn by the author because there are some typos in proofs.

This paper has been withdrawn by the author due to an error.

This paper has been withdrawn by the authors because the authors excluded the paper from electronic proceedings of the conference.

This paper was withdrawn by the author.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author.

This paper has been withdrawn by the authors.

This paper has been withdrawn, and will be superseded by another submission.

This paper has been withdrawn because it draws incorrect conclusions from the results of its calculations.

This paper has been withdrawn by authors for significant modification.

This paper has been withdrawn by the author. It will be posted on astro-ph once the proceedings of the 363rd Heraeus Seminar on Neutron Stars and Pulsars are ready.

The paper has been withdrawn by the author.