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Science 13 February 2009:
Vol. 323. no. 5916, pp. 888 - 890
DOI: 10.1126/science.1169344
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Perspectives

PHYSICS:
Fast Electrons Tie Quantum Knots

Jan Zaanen

Special relativity and quantum physics combine to generate unusual arrangements of electron spins in two different solids.

Lorentz Institute for Theoretical Physics, Leiden University, 2300 RA Leiden, Netherlands. E-mail: jan{at}lorentz.leidenuniv.nl

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Science. ISSN 0036-8075 (print), 1095-9203 (online)