Magnetic Field Enhanced Coherence Length in Cold Atomic Gases
arXiv:cond-mat/0401455 · doi:10.1103/PhysRevLett.93.143906
Abstract
We study the effect of an external magnetic field on coherent backscattering of light from a cool rubidium vapor. We observe that the backscattering enhancement factor can be {\it increased} with . This surprising behavior shows that the coherence length of the system can be increased by applying a magnetic field, in sharp contrast with ususal situations. This is mainly due to the lifting of the degeneracy between Zeeman sublevels. We find good agreement between our experimental data and a full Monte-Carlosimulation, taking into account the magneto-optical effects and the geometry of the atomic cloud.
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- Control of light trapping in a large atomic system by a static magnetic field
- Light transport in cold atoms and thermal decoherence
- Localization transition for light scattering by cold atoms in an external magnetic field
- Towards a random laser with cold atoms
- Coherent backscattering in nonlinear atomic media: quantum Langevin approach
- Gain narrowing in few-atom systems
- Multiple scattering of light in cold atomic clouds with a magnetic field
- Mesoscopic scattering of spin s particles
- Photonic Hall effect in cold atomic clouds
- Diffusive spin transport
- Coherent backscattering of light from saturated atoms
- Coherent backscattering under conditions of electromagnetically induced transparency
- Weak localization of light in hot atomic vapors
- Breaking of reciprocity and the Pancharatnam-Berry phase for light scattered by a disordered cold atom cloud