An oscillating Casimir potential between two impurities in a spin-orbit coupled Bose-Einstein condensate
Quantum Gases
2017-10-25 v1
Abstract
We study the Casimir potential between two impurities immersed in a spin-orbit coupled BoseEinstein condensate (BEC) with plane-wave order. We find that, by exchanging the virtual phonons/excitations, a remarkable anisotropic oscillating potential with both positive and negative parts can be induced between the impurities, with the period of the oscillation depending on the spin-orbit coupling strength. As a consequence, this would inevitably lead to a non-central Casimir force, which can be tuned by varying the strength of spin-orbit coupling . These results are elucidated for BECs with one-dimensional Raman-induced and two-dimensional Rashba-type SOC.
Cite
@article{arxiv.1709.01978,
title = {An oscillating Casimir potential between two impurities in a spin-orbit coupled Bose-Einstein condensate},
author = {Pei-Song He and Qing Sun and An-Chun Ji},
journal= {arXiv preprint arXiv:1709.01978},
year = {2017}
}
Comments
6 pages, 3 figures