We recently got a few questions like:
It should be quite obvious that these are not directly related to quantum computing or quantum information theory. I have no problems if users want to ask such questions to quantum information theorists or the quantum computing folks. Being too restrictive in the beta stage might actually be counter-productive. I myself had gotten an excellent answer to my question What is the use of Categorical quantum mechanics?, which, in hindsight, isn't directly related to those either of those fields.
But, I can also empathize with those who do feel that Physics Stack Exchange would be a better home for such questions. Since we currently do not have any community consensus on this, I would suggest using a custom close reason like:
I'm voting to close this question as off-topic. In its current form, it does not appear to be about quantum computing or quantum information and is thus off-topic here. It might be better suited for
[physics.se]. If you feel otherwise, please
the question to clarify.
(By the way,
 written with square brackets are magic links ;)
It may not be possible for the moderators to officially add this as a close reason, without requesting the Stack Exchange devs to set up a migration path. Moreover, migration paths are usually set up when regular migrations occur from one site to site, and that is quite rare for beta sites like ours. So, for the time being, if you come across such questions, you can use simply create a custom close reason like the one I mentioned above by clicking on
Other (add a comment explaining what is wrong). Subsequently, if 4 other users vote to close using the manual option created by you, it will be put on hold.