Prof. R.Y. Chiao already showed that a superluminal *group* velocity is possible (Brillouin describes 5 different kinds of velocities).
http://arxiv.org/abs/quant-ph/9810031
http://arxiv.org/abs/quant-ph/9811019
http://arxiv.org/abs/quant-ph/0004047
So the essential question is not *can light travel faster than light?* but *is superluminal signaling possible?*
scerir
p.s.. *is quantum nonlocality a superluminal carrier* is (also) an interesting question, in my opinion.
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