I don't know if anybody has done this before, but I was able to get some Solenopsis Geminata alate to mate artificially. I'll share the method I did. Don't read this if you get too squeamish .
I chilled the female alates and gently held the male between two toothpicks. After removing the queen, I held the male's gaster to the female's gaster, eventually seeing the male latch on for a bit. I couldn't tell if it worked, but the queen's gaster is looking significantly larger. Also the queens broke off their wings and are grooming a lot.
Thanks for reading this!