Turbulence-free ghost imaging

Atmospheric turbulence is a serious problem for satellite and aircraft-to-ground based classical imaging. Taking advantage of the natural, nonfactorizable, point-to-point correlation of thermal light, this experiment demonstrated turbulence-free ghost imaging, which will be extremely useful for these applications. In addition, this observation suggests that the nontrivial intensity-intensity correlation of thermal light cannot be caused by the statistical correlation of intensity fluctuations.