I’ve had some disagreements in the past with the noble editor of Lab Lit over what constitutes lab lit, but I’ve just read a book I’m sure Jenny would allow is the real thing, as there are no science fiction ventures, and one of the two main characters is a theoretical physicist (the other is his mother). It’s Tangled Roots by Sue Guiney (see my brief review here).
Thanks for the tip! From your synopsis in the other place, it certainly looks to be lab lit. We’ll check it out.