Quantum Machine Learning [pdf]

>They're busy with Numerics Flow, a Tensor Flow-like quantum machine learning framework

I wasn't able to find anything about Google's Numerics flow. Would you provide a reference?

> Anybody else active in this field?

Yes. Rigetti Computing has also been working in this area. https://medium.com/rigetti/rigetti-partners-with-cdl-to-driv...

It is called a review article. Such a paper is meant to summarize the current understanding in an ongoing field of research. It is useful for researches who are not (yet) intimately familiar with that field. They might want to add contributions of their own in that area or they might find that they can transfer some ideas to their own fields of research. For people working in that area themselves a review paper is also useful to find citations and discussions of recent research papers.

You might notice this was written by actual researchers working in the field, and that it was published in the Reviews section of Nature.

Not sure what your issue with the article is. Review papers are among the most cited and important publications in science. There are entire journals dedicated to them, and their impact factor is often an order of magnitude higher than that of original research journals.

If you tried to be as smart as them you'd quickly appreciate the utility of review articles. We can't really have an apprenticeship style of education so we who cannot physically study under the scientists rely on their publications, including the more accessible review papers...

Admittedly maybe getting it out in nature is a bit of an eyeball grabber but.. Still useful.

The reason is that review papers offer a roadmap of the field allowing new researchers or generally anyone interested to understand what has been studied and what still remains to be examined. It's incredibly useful because otherwise you would have to manually read hundreds of research papers and synthesize that information manually into a clear picture (which they do for you).