Volume 96, Number 1, October 2011
|Number of page(s)||5|
|Published online||15 September 2011|
Converting Zitterbewegung oscillation to directed motion
Centre of Quantum Technologies and Department of Physics, National University of Singapore Singapore 117543, Republic of Singapore
2 Department of Physics and Centre for Computational Science and Engineering, National University of Singapore Singapore 117542, Republic of Singapore
3 NUS Graduate School for Integrative Sciences and Engineering - Singapore 117597, Republic of Singapore
4 Institute of Advanced Studies, Nanyang Technological University - Singapore 639798, Republic of Singapore
Accepted: 10 August 2011
Zitterbewegung (ZB) oscillation, namely, the jittering center-of-mass motion predicted by free-space Dirac (or Dirac-like) equations, has been studied in several different contexts. It is shown here that ZB can be converted to directed center-of-mass motion by a modulation of the Dirac-like equation, if the modulation is on resonance with the ZB frequency. Tailored modulation may also stop, re-launch or even reverse the directed motion of a wavepacket with negligible distortion. The predictions may be examined by current ZB experiments using trapped-ion systems.
PACS: 03.75.-b – Matter waves / 32.80.Qk – Coherent control of atomic interactions with photons / 71.70.Ej – Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect
© EPLA, 2011
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