Skipetrov S E, Sokolov I M
Université Grenoble Alpes, LPMMC, F-38000 Grenoble, France and CNRS, LPMMC, F-38000 Grenoble, France.
Department of Theoretical Physics, St. Petersburg State Polytechnic University, 195251 St. Petersburg, Russia.
Phys Rev Lett. 2015 Feb 6;114(5):053902. doi: 10.1103/PhysRevLett.114.053902. Epub 2015 Feb 5.
We discover a transition from extended to localized quasimodes for light in a gas of immobile two-level atoms in a magnetic field. The transition takes place either upon increasing the number density of atoms in a strong field or upon increasing the field at a high enough density. It has many characteristic features of a disorder-driven (Anderson) transition but is strongly influenced by near-field interactions between atoms and the anisotropy of the atomic medium induced by the magnetic field.
我们发现，在磁场中静止的两能级原子气体中，光的准模从扩展态转变为局域态。这种转变要么发生在强场中增加原子数密度时，要么发生在足够高的密度下增加磁场时。它具有无序驱动（安德森）转变的许多特征，但受到原子间近场相互作用以及磁场引起的原子介质各向异性的强烈影响。
