They COULD, but you might not want them breeding if they aren't big enough to do so. That's another issue all together right now. I say you still want to seperate them because it is stressful for either animal! If you want them to calm down and settle in...it's what would be best at this point.
As for food (since you got two answers) I recommend waiting a while also. They need to just rest a while alone and then maybe in a FEW days try offering a prey item to each. I recommend f/t myself. See if they readily take the food that way. Live can hurt the snakes otherwise...especially if they decide not to eat for you.