Quantum spin Hall effect of light

@article{Bliokh2015QuantumSH,
  title={Quantum spin Hall effect of light},
  author={Konstantin Y. Bliokh and Daria A. Smirnova and Franco Nori},
  journal={Science},
  year={2015},
  volume={348},
  pages={1448 - 1451}
}
A quantum twist on classical optics Interpreting recent experimental results of light interactions with matter shows that the classical Maxwell theory of light has intrinsic quantum spin Hall effect properties even in free space. Complex effects in condensed-matter systems can often find analogs in cleaner optical systems. Bliokh et al. argue that the optical systems exhibiting such complex phenomena should also be simpler (see the Perspective by Stone). Their theoretical study shows that free… 
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