Inverting the quantum cloning of photons

DennisN
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Anyone keen on taking a bite at this? I understand what it's about (at least I think so), but I am certainly not qualified to evaluate it :shy:.

"Inverting the quantum cloning of photons" (Sadegh Raeisi, Wolfgang Tittel, Christoph Simon)
Arxiv: http://arxiv.org/abs/1111.7283
Article: http://www.physorg.com/news/2012-03-quantum.html (PhysOrg)
 
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Very interesting paper. Sort of another form of quantum eraser. I think actually performing the experiment will be very hard.
 
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