Should I use double quotes throughout the paper even after defining the terms in the introductory section? Say I have introduced/defined some not-so-common terms like "clock register", "ancilla", etc. in the first section of a research paper, and while doing so I kept them within double quotes. However, I was wondering whether even during the subsequent occurrences of those terms I should use double quotes or not. 

What's the convention regarding this in the physics and computer science communities?
The usual convention in CS:


Use italics when you first mention the term and define it.
After that, you will use it just like any other word. No italics, no boldface, no quotation marks.