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arXiv · 1104.0444

Macroscopic Klein Tunneling in spin-orbit coupled Bose-Einstein Condensates

Dan-Wei Zhang·Zheng-Yuan Xue·Hui Yan·Z. D. Wang·Shi-Liang Zhu
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Abstract

We propose an experimental scheme to detect macroscopic Klein tunneling with spin-orbit coupled Bose-Einstein condensates (BECs). We show that a nonlinear Dirac equation with tunable parameters can be realized with such BECs. %in a simple configuration to generate the artificial spin-orbit coupling. Through numerical calculations, we demonstrate that macroscopic Klein tunneling can be clearly detected under realistic conditions. Macroscopic quantum coherence in such relativistic tunneling is clarified and a BEC with a negative energy is shown to be able to transmit transparently through a wide Gaussian potential barrier.

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Dan-Wei Zhang, Zheng-Yuan Xue, Hui Yan, Z. D. Wang, Shi-Liang Zhu. 2012-01-26. Macroscopic Klein Tunneling in spin-orbit coupled Bose-Einstein Condensates. https://doi.org/10.1103/physreva.85.013628

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