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arXiv · 1510.03787

Interacting spin-orbit-coupled spin-1 Bose-Einstein condensates

Kuei Sun·Chunlei Qu·Yong Xu·Yongping Zhang·Chuanwei Zhang
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Abstract

The recent experimental realization of spin-orbit (SO) coupling for spin-1 ultracold atoms opens an interesting avenue for exploring SO-coupling-related physics in large-spin systems, which is generally unattainable in electronic materials. In this paper, we study the effects of interactions between atoms on the ground states and collective excitations of SO-coupled spin-1 Bose-Einstein condensates (BECs) in the presence of a spin-tensor potential. We find that ferromagnetic interaction between atoms can induce a stripe phase exhibiting in-phase or out-of-phase modulating patterns between spin-tensor and zero-spin-component density waves. We characterize the phase transitions between different phases using the spin-tensor density as well as the collective dipole motion of the BEC. We show that there exists a double maxon-roton structure in the Bogoliubov-excitation spectrum, attributed to the three band minima of the SO-coupled spin-1 BEC.

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Kuei Sun, Chunlei Qu, Yong Xu, Yongping Zhang, Chuanwei Zhang. 2016-02-10. Interacting spin-orbit-coupled spin-1 Bose-Einstein condensates. https://doi.org/10.1103/physreva.93.023615

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