Levitation, what is the first thing that comes to your mind when you hear this word? Flying, hovering , right? It might seem quite confusing to a noob and they might wonder if this is even possible. But modern day cameras and editing software have made it quite easy.
You don't take a photograph, you make it. -Ansel Adams
The above statement turns out to be very true , specially in this case. They are two techniques photographers practice to create a levitating effect.
Freezing the motion
Unlike the old days when you were to stand in front of a camera for 30 seconds just to get yourself one picture, modern DSLR's are the other way around i.e they shoot at a shutter speed as fast as 8000th of a second and hence allowing us to freeze life in that very frame. So to get your desired results set your camera to manual mode.
Now the next thing is to set your iso and aperture accordingly and your shutter speed to around 1000th of a second. For this a tripod is not necessary but it will make your life a lot easier. Ask your model to jump in the air and push down the shutter button while they are in the air. Practice this a few times and you will get your shot.