Personally, I've done low-carb diets where things with sugar are almost entirely off-limits, minus a small amount of fruit, and whatever small quantities of sugar are present in non-starchy vegetable. During these diets, I've tried them with and without artificial sugars. Those artificial sugars would be consumed in either diet drinks/sodas, or with coffee. I had the occasional desire to consume something with lots of carbs/sugar, but I can't say it was any strong with artificial sugars than without.
If anything, for me, the artificial sugars worked to satiate the desire for something sweet.