Quantum – Open journal for quantum science
quantum-journal.org
quantum-journal.org
A bit of DDG'ing turned up the Reddit https://www.reddit.com/r/quantumjournal , which had a broken link to a Physics Today article (https://www.reddit.com/r/quantumjournal/comments/5c3zzb/arti...) that I think was supposed to point to http://physicstoday.scitation.org/do/10.1063/PT.5.2050/full .
"Code of conduct for Quantum?"
"Should Quantum accept all correct papers or judge for quality?"
"Terms and conditions of Quantum. Feedback appreciated!"
"Should open data be a requirement for publication in Quantum?"
https://www.reddit.com/r/quantumjournal/top/?sort=top&t=all
The second one, in particular, is worth reading through.
https://www.reddit.com/r/quantumjournal/comments/50lucs/shou...
The publication fee ($215) is optional and far-and-away the lowest among open-access quantum info journals (all others > $1k).
https://www.facebook.com/photo.php?fbid=10100919693768184&se...
ArXiv overlay journals are a very promising idea, but they have been slow to develop. Watching all the work that went into launching Quantum gave me a new appreciation for how hard this is. Time will tell whether it succeeds as a journal and, more importantly, actually has an impact on the journal ecosystem. But it's definitely a valiant attempt.
So clearly it must be legit :)