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We study the zitterbewegung of electronic wave packets in III-V zinc-blendesemiconductor quantum wells due to spin-orbit coupling. Our results suggest adirect experimental proof of this fundamental effect, confirming along-standing theoretical prediction. For electron motion in a harmonic quantumwire, we numerically and analytically find a resonance condition maximizing thezitterbewegung.Comment: 5 pages, 2 figures included, a few remarks added, to appear in Phys.  Rev. Let

Zitterbewegungof Electronic Wave Packets in III-V Zinc-Blende Semiconductor Quantum Wells