arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1901.04853cond-mat.dis-nnphysics.atom-ph
收藏

静态电场中冷原子对光的安德森局域化的研究

Search for Anderson localization of light by cold atoms in a static electric field

S. E. Skipetrov, I. M. Sokolov

摘要:

我们探讨了电场诱导光的安德森局域化的潜力在一个大的三维(3D)云的随机分布,不动的原子与简并基态(总角动量$J_g = 0$)和三重简并激发态($J_e = 1$)。我们研究了原子云准模的空间结构和无量纲数随云大小的变化。我们的结果表明,与静磁场不同,电场不会引起原子对光的安德森局域化。我们解释了这一结论的不完全消除的激发态原子的简并由场和相对较强的剩余偶极偶极耦合原子之间的弱于在没有外部场,但强于在存在的静态磁场。联合分析这些结果连同我们以前的结果有关安德森局域化的标量波和光表明存在一个临界强度的偶极-偶极相互作用,不应该超过安德森局域化是可能的在3D。

英文摘要:

We explore the potential of a static electric field to induce Anderson localization of light in a large three-dimensional (3D) cloud of randomly distributed, immobile atoms with a degenerate ground state (total angular momentum $J_g = 0$) and a three-fold degenerate excited state ($J_e = 1$). We study both the spatial structure of quasimodes of the atomic cloud and the scaling of the Thouless number with the size of the cloud. Our results indicate that unlike the static magnetic field, the electric field does not induce Anderson localization of light by atoms. We explain this conclusion by the incomplete removal of degeneracy of the excited atomic state by the field and the relatively strong residual dipole-dipole coupling between atoms which is weaker than in the absence of external fields but stronger than in the presence of a static magnetic field. A joint analysis of these results together with our previous results concerning Anderson localization of scalar waves and light suggests the existence of a critical strength of dipole-dipole interactions that should not be surpassed for Anderson localization to be possible in 3D.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑