Abstract
We establish a localization phase diagram for light in a random three-dimensional (3D) ensemble of motionless two-level atoms with a threefold degenerate upper level, in a strong static magnetic field. Localized modes appear in a narrow spectral band when the number density of atoms exceeds a critical value , where is the wave number of light in the free space. A critical exponent of the localization transition taking place upon varying the frequency of light at a constant is estimated to be . This classifies the transition as an Anderson localization transition of 3D orthogonal universality class.
- Received 11 May 2018
DOI:https://doi.org/10.1103/PhysRevLett.121.093601
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