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

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

2011-04-04

arxiv.org/abs/1104.0444v2

Phys. Rev. A 85, 013628 (2012)

Physics

Condensed Matter

Quantum Gases

6 pages; 3 figures; Added detailed calculations; Published Version

Scientific paper

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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