dehydrating food with a vacuum chamber
You can certain lyophilize fruit. It's done commercially and there's no insurmountable barrier to doing it at home. Since water basically 'boils til it freezes' in a vacuum, then slowly sublimes, you're not likely to get much improvement on a dehydrator's  12-24 hour cycle. For some fruits however, product can be much better when freeze dried. Here's some examples of what you can get: Bananas, peas, tomato slices, carrot slices, spinach, beans, mango, whole berrys etc.