Sorry, but no this is not a quantum computer leap. It's a cute paper but woefully far from a complete solution. Some problems 1) the procedure appears to requ

Sorry, but no this is not a quantum computer leap. It's a cute paper but woefully far from a complete solution. Some problems 1) the procedure appears to require 100 percent detection of photons (there is no analysis of this in the paper). This is not practical and ends up being a source of decoherence (the very thing this paper is supposed to avoid) 2) the scheme depends for its gates and construction of a graph state (a kind of resource quantum state) on precise settings of polarized beam splitters, something which will certainly have errors and hence...decoherence again. 3) the author shows how to create a graph state but makes no mention of why this state will persist. Why won't it deco here while waiting for the necessarily adaptive measurement?